diff --git a/examples/DemoRunner/Builds/Android/app/CMakeLists.txt b/examples/DemoRunner/Builds/Android/app/CMakeLists.txt
index 247039a618..8abed3bb5a 100644
--- a/examples/DemoRunner/Builds/Android/app/CMakeLists.txt
+++ b/examples/DemoRunner/Builds/Android/app/CMakeLists.txt
@@ -585,6 +585,7 @@ add_library( ${BINARY_NAME}
     "../../../../../modules/juce_audio_processors/processors/juce_AudioProcessor.h"
     "../../../../../modules/juce_audio_processors/processors/juce_AudioProcessorEditor.cpp"
     "../../../../../modules/juce_audio_processors/processors/juce_AudioProcessorEditor.h"
+    "../../../../../modules/juce_audio_processors/processors/juce_AudioProcessorEditorHostContext.h"
     "../../../../../modules/juce_audio_processors/processors/juce_AudioProcessorGraph.cpp"
     "../../../../../modules/juce_audio_processors/processors/juce_AudioProcessorGraph.h"
     "../../../../../modules/juce_audio_processors/processors/juce_AudioProcessorListener.h"
@@ -613,12 +614,15 @@ add_library( ${BINARY_NAME}
     "../../../../../modules/juce_audio_processors/utilities/juce_AudioProcessorParameterWithID.h"
     "../../../../../modules/juce_audio_processors/utilities/juce_AudioProcessorValueTreeState.cpp"
     "../../../../../modules/juce_audio_processors/utilities/juce_AudioProcessorValueTreeState.h"
+    "../../../../../modules/juce_audio_processors/utilities/juce_ExtensionsVisitor.h"
     "../../../../../modules/juce_audio_processors/utilities/juce_ParameterAttachments.cpp"
     "../../../../../modules/juce_audio_processors/utilities/juce_ParameterAttachments.h"
     "../../../../../modules/juce_audio_processors/utilities/juce_PluginHostType.cpp"
     "../../../../../modules/juce_audio_processors/utilities/juce_PluginHostType.h"
     "../../../../../modules/juce_audio_processors/utilities/juce_RangedAudioParameter.cpp"
     "../../../../../modules/juce_audio_processors/utilities/juce_RangedAudioParameter.h"
+    "../../../../../modules/juce_audio_processors/utilities/juce_VST3ClientExtensions.h"
+    "../../../../../modules/juce_audio_processors/utilities/juce_VSTCallbackHandler.h"
     "../../../../../modules/juce_audio_processors/juce_audio_processors.cpp"
     "../../../../../modules/juce_audio_processors/juce_audio_processors.mm"
     "../../../../../modules/juce_audio_processors/juce_audio_processors.h"
@@ -2366,6 +2370,7 @@ set_source_files_properties("../../../../../modules/juce_audio_processors/proces
 set_source_files_properties("../../../../../modules/juce_audio_processors/processors/juce_AudioProcessor.h" PROPERTIES HEADER_FILE_ONLY TRUE)
 set_source_files_properties("../../../../../modules/juce_audio_processors/processors/juce_AudioProcessorEditor.cpp" PROPERTIES HEADER_FILE_ONLY TRUE)
 set_source_files_properties("../../../../../modules/juce_audio_processors/processors/juce_AudioProcessorEditor.h" PROPERTIES HEADER_FILE_ONLY TRUE)
+set_source_files_properties("../../../../../modules/juce_audio_processors/processors/juce_AudioProcessorEditorHostContext.h" PROPERTIES HEADER_FILE_ONLY TRUE)
 set_source_files_properties("../../../../../modules/juce_audio_processors/processors/juce_AudioProcessorGraph.cpp" PROPERTIES HEADER_FILE_ONLY TRUE)
 set_source_files_properties("../../../../../modules/juce_audio_processors/processors/juce_AudioProcessorGraph.h" PROPERTIES HEADER_FILE_ONLY TRUE)
 set_source_files_properties("../../../../../modules/juce_audio_processors/processors/juce_AudioProcessorListener.h" PROPERTIES HEADER_FILE_ONLY TRUE)
@@ -2394,12 +2399,15 @@ set_source_files_properties("../../../../../modules/juce_audio_processors/utilit
 set_source_files_properties("../../../../../modules/juce_audio_processors/utilities/juce_AudioProcessorParameterWithID.h" PROPERTIES HEADER_FILE_ONLY TRUE)
 set_source_files_properties("../../../../../modules/juce_audio_processors/utilities/juce_AudioProcessorValueTreeState.cpp" PROPERTIES HEADER_FILE_ONLY TRUE)
 set_source_files_properties("../../../../../modules/juce_audio_processors/utilities/juce_AudioProcessorValueTreeState.h" PROPERTIES HEADER_FILE_ONLY TRUE)
+set_source_files_properties("../../../../../modules/juce_audio_processors/utilities/juce_ExtensionsVisitor.h" PROPERTIES HEADER_FILE_ONLY TRUE)
 set_source_files_properties("../../../../../modules/juce_audio_processors/utilities/juce_ParameterAttachments.cpp" PROPERTIES HEADER_FILE_ONLY TRUE)
 set_source_files_properties("../../../../../modules/juce_audio_processors/utilities/juce_ParameterAttachments.h" PROPERTIES HEADER_FILE_ONLY TRUE)
 set_source_files_properties("../../../../../modules/juce_audio_processors/utilities/juce_PluginHostType.cpp" PROPERTIES HEADER_FILE_ONLY TRUE)
 set_source_files_properties("../../../../../modules/juce_audio_processors/utilities/juce_PluginHostType.h" PROPERTIES HEADER_FILE_ONLY TRUE)
 set_source_files_properties("../../../../../modules/juce_audio_processors/utilities/juce_RangedAudioParameter.cpp" PROPERTIES HEADER_FILE_ONLY TRUE)
 set_source_files_properties("../../../../../modules/juce_audio_processors/utilities/juce_RangedAudioParameter.h" PROPERTIES HEADER_FILE_ONLY TRUE)
+set_source_files_properties("../../../../../modules/juce_audio_processors/utilities/juce_VST3ClientExtensions.h" PROPERTIES HEADER_FILE_ONLY TRUE)
+set_source_files_properties("../../../../../modules/juce_audio_processors/utilities/juce_VSTCallbackHandler.h" PROPERTIES HEADER_FILE_ONLY TRUE)
 set_source_files_properties("../../../../../modules/juce_audio_processors/juce_audio_processors.cpp" PROPERTIES HEADER_FILE_ONLY TRUE)
 set_source_files_properties("../../../../../modules/juce_audio_processors/juce_audio_processors.mm" PROPERTIES HEADER_FILE_ONLY TRUE)
 set_source_files_properties("../../../../../modules/juce_audio_processors/juce_audio_processors.h" PROPERTIES HEADER_FILE_ONLY TRUE)
diff --git a/examples/DemoRunner/Builds/VisualStudio2015/DemoRunner_App.vcxproj b/examples/DemoRunner/Builds/VisualStudio2015/DemoRunner_App.vcxproj
index f7efda94f2..320cfb6ddc 100644
--- a/examples/DemoRunner/Builds/VisualStudio2015/DemoRunner_App.vcxproj
+++ b/examples/DemoRunner/Builds/VisualStudio2015/DemoRunner_App.vcxproj
@@ -2772,6 +2772,7 @@
     <ClInclude Include="..\..\..\..\modules\juce_audio_processors\processors\juce_AudioPluginInstance.h"/>
     <ClInclude Include="..\..\..\..\modules\juce_audio_processors\processors\juce_AudioProcessor.h"/>
     <ClInclude Include="..\..\..\..\modules\juce_audio_processors\processors\juce_AudioProcessorEditor.h"/>
+    <ClInclude Include="..\..\..\..\modules\juce_audio_processors\processors\juce_AudioProcessorEditorHostContext.h"/>
     <ClInclude Include="..\..\..\..\modules\juce_audio_processors\processors\juce_AudioProcessorGraph.h"/>
     <ClInclude Include="..\..\..\..\modules\juce_audio_processors\processors\juce_AudioProcessorListener.h"/>
     <ClInclude Include="..\..\..\..\modules\juce_audio_processors\processors\juce_AudioProcessorParameter.h"/>
@@ -2787,9 +2788,12 @@
     <ClInclude Include="..\..\..\..\modules\juce_audio_processors\utilities\juce_AudioParameterInt.h"/>
     <ClInclude Include="..\..\..\..\modules\juce_audio_processors\utilities\juce_AudioProcessorParameterWithID.h"/>
     <ClInclude Include="..\..\..\..\modules\juce_audio_processors\utilities\juce_AudioProcessorValueTreeState.h"/>
+    <ClInclude Include="..\..\..\..\modules\juce_audio_processors\utilities\juce_ExtensionsVisitor.h"/>
     <ClInclude Include="..\..\..\..\modules\juce_audio_processors\utilities\juce_ParameterAttachments.h"/>
     <ClInclude Include="..\..\..\..\modules\juce_audio_processors\utilities\juce_PluginHostType.h"/>
     <ClInclude Include="..\..\..\..\modules\juce_audio_processors\utilities\juce_RangedAudioParameter.h"/>
+    <ClInclude Include="..\..\..\..\modules\juce_audio_processors\utilities\juce_VST3ClientExtensions.h"/>
+    <ClInclude Include="..\..\..\..\modules\juce_audio_processors\utilities\juce_VSTCallbackHandler.h"/>
     <ClInclude Include="..\..\..\..\modules\juce_audio_processors\juce_audio_processors.h"/>
     <ClInclude Include="..\..\..\..\modules\juce_audio_utils\audio_cd\juce_AudioCDBurner.h"/>
     <ClInclude Include="..\..\..\..\modules\juce_audio_utils\audio_cd\juce_AudioCDReader.h"/>
diff --git a/examples/DemoRunner/Builds/VisualStudio2015/DemoRunner_App.vcxproj.filters b/examples/DemoRunner/Builds/VisualStudio2015/DemoRunner_App.vcxproj.filters
index f8666269b4..2bcad16ef3 100644
--- a/examples/DemoRunner/Builds/VisualStudio2015/DemoRunner_App.vcxproj.filters
+++ b/examples/DemoRunner/Builds/VisualStudio2015/DemoRunner_App.vcxproj.filters
@@ -4008,6 +4008,9 @@
     <ClInclude Include="..\..\..\..\modules\juce_audio_processors\processors\juce_AudioProcessorEditor.h">
       <Filter>JUCE Modules\juce_audio_processors\processors</Filter>
     </ClInclude>
+    <ClInclude Include="..\..\..\..\modules\juce_audio_processors\processors\juce_AudioProcessorEditorHostContext.h">
+      <Filter>JUCE Modules\juce_audio_processors\processors</Filter>
+    </ClInclude>
     <ClInclude Include="..\..\..\..\modules\juce_audio_processors\processors\juce_AudioProcessorGraph.h">
       <Filter>JUCE Modules\juce_audio_processors\processors</Filter>
     </ClInclude>
@@ -4053,6 +4056,9 @@
     <ClInclude Include="..\..\..\..\modules\juce_audio_processors\utilities\juce_AudioProcessorValueTreeState.h">
       <Filter>JUCE Modules\juce_audio_processors\utilities</Filter>
     </ClInclude>
+    <ClInclude Include="..\..\..\..\modules\juce_audio_processors\utilities\juce_ExtensionsVisitor.h">
+      <Filter>JUCE Modules\juce_audio_processors\utilities</Filter>
+    </ClInclude>
     <ClInclude Include="..\..\..\..\modules\juce_audio_processors\utilities\juce_ParameterAttachments.h">
       <Filter>JUCE Modules\juce_audio_processors\utilities</Filter>
     </ClInclude>
@@ -4062,6 +4068,12 @@
     <ClInclude Include="..\..\..\..\modules\juce_audio_processors\utilities\juce_RangedAudioParameter.h">
       <Filter>JUCE Modules\juce_audio_processors\utilities</Filter>
     </ClInclude>
+    <ClInclude Include="..\..\..\..\modules\juce_audio_processors\utilities\juce_VST3ClientExtensions.h">
+      <Filter>JUCE Modules\juce_audio_processors\utilities</Filter>
+    </ClInclude>
+    <ClInclude Include="..\..\..\..\modules\juce_audio_processors\utilities\juce_VSTCallbackHandler.h">
+      <Filter>JUCE Modules\juce_audio_processors\utilities</Filter>
+    </ClInclude>
     <ClInclude Include="..\..\..\..\modules\juce_audio_processors\juce_audio_processors.h">
       <Filter>JUCE Modules\juce_audio_processors</Filter>
     </ClInclude>
diff --git a/examples/DemoRunner/Builds/VisualStudio2017/DemoRunner_App.vcxproj b/examples/DemoRunner/Builds/VisualStudio2017/DemoRunner_App.vcxproj
index 061444e071..877e9705fa 100644
--- a/examples/DemoRunner/Builds/VisualStudio2017/DemoRunner_App.vcxproj
+++ b/examples/DemoRunner/Builds/VisualStudio2017/DemoRunner_App.vcxproj
@@ -2772,6 +2772,7 @@
     <ClInclude Include="..\..\..\..\modules\juce_audio_processors\processors\juce_AudioPluginInstance.h"/>
     <ClInclude Include="..\..\..\..\modules\juce_audio_processors\processors\juce_AudioProcessor.h"/>
     <ClInclude Include="..\..\..\..\modules\juce_audio_processors\processors\juce_AudioProcessorEditor.h"/>
+    <ClInclude Include="..\..\..\..\modules\juce_audio_processors\processors\juce_AudioProcessorEditorHostContext.h"/>
     <ClInclude Include="..\..\..\..\modules\juce_audio_processors\processors\juce_AudioProcessorGraph.h"/>
     <ClInclude Include="..\..\..\..\modules\juce_audio_processors\processors\juce_AudioProcessorListener.h"/>
     <ClInclude Include="..\..\..\..\modules\juce_audio_processors\processors\juce_AudioProcessorParameter.h"/>
@@ -2787,9 +2788,12 @@
     <ClInclude Include="..\..\..\..\modules\juce_audio_processors\utilities\juce_AudioParameterInt.h"/>
     <ClInclude Include="..\..\..\..\modules\juce_audio_processors\utilities\juce_AudioProcessorParameterWithID.h"/>
     <ClInclude Include="..\..\..\..\modules\juce_audio_processors\utilities\juce_AudioProcessorValueTreeState.h"/>
+    <ClInclude Include="..\..\..\..\modules\juce_audio_processors\utilities\juce_ExtensionsVisitor.h"/>
     <ClInclude Include="..\..\..\..\modules\juce_audio_processors\utilities\juce_ParameterAttachments.h"/>
     <ClInclude Include="..\..\..\..\modules\juce_audio_processors\utilities\juce_PluginHostType.h"/>
     <ClInclude Include="..\..\..\..\modules\juce_audio_processors\utilities\juce_RangedAudioParameter.h"/>
+    <ClInclude Include="..\..\..\..\modules\juce_audio_processors\utilities\juce_VST3ClientExtensions.h"/>
+    <ClInclude Include="..\..\..\..\modules\juce_audio_processors\utilities\juce_VSTCallbackHandler.h"/>
     <ClInclude Include="..\..\..\..\modules\juce_audio_processors\juce_audio_processors.h"/>
     <ClInclude Include="..\..\..\..\modules\juce_audio_utils\audio_cd\juce_AudioCDBurner.h"/>
     <ClInclude Include="..\..\..\..\modules\juce_audio_utils\audio_cd\juce_AudioCDReader.h"/>
diff --git a/examples/DemoRunner/Builds/VisualStudio2017/DemoRunner_App.vcxproj.filters b/examples/DemoRunner/Builds/VisualStudio2017/DemoRunner_App.vcxproj.filters
index 85a8cd8e3b..16faa9fffa 100644
--- a/examples/DemoRunner/Builds/VisualStudio2017/DemoRunner_App.vcxproj.filters
+++ b/examples/DemoRunner/Builds/VisualStudio2017/DemoRunner_App.vcxproj.filters
@@ -4008,6 +4008,9 @@
     <ClInclude Include="..\..\..\..\modules\juce_audio_processors\processors\juce_AudioProcessorEditor.h">
       <Filter>JUCE Modules\juce_audio_processors\processors</Filter>
     </ClInclude>
+    <ClInclude Include="..\..\..\..\modules\juce_audio_processors\processors\juce_AudioProcessorEditorHostContext.h">
+      <Filter>JUCE Modules\juce_audio_processors\processors</Filter>
+    </ClInclude>
     <ClInclude Include="..\..\..\..\modules\juce_audio_processors\processors\juce_AudioProcessorGraph.h">
       <Filter>JUCE Modules\juce_audio_processors\processors</Filter>
     </ClInclude>
@@ -4053,6 +4056,9 @@
     <ClInclude Include="..\..\..\..\modules\juce_audio_processors\utilities\juce_AudioProcessorValueTreeState.h">
       <Filter>JUCE Modules\juce_audio_processors\utilities</Filter>
     </ClInclude>
+    <ClInclude Include="..\..\..\..\modules\juce_audio_processors\utilities\juce_ExtensionsVisitor.h">
+      <Filter>JUCE Modules\juce_audio_processors\utilities</Filter>
+    </ClInclude>
     <ClInclude Include="..\..\..\..\modules\juce_audio_processors\utilities\juce_ParameterAttachments.h">
       <Filter>JUCE Modules\juce_audio_processors\utilities</Filter>
     </ClInclude>
@@ -4062,6 +4068,12 @@
     <ClInclude Include="..\..\..\..\modules\juce_audio_processors\utilities\juce_RangedAudioParameter.h">
       <Filter>JUCE Modules\juce_audio_processors\utilities</Filter>
     </ClInclude>
+    <ClInclude Include="..\..\..\..\modules\juce_audio_processors\utilities\juce_VST3ClientExtensions.h">
+      <Filter>JUCE Modules\juce_audio_processors\utilities</Filter>
+    </ClInclude>
+    <ClInclude Include="..\..\..\..\modules\juce_audio_processors\utilities\juce_VSTCallbackHandler.h">
+      <Filter>JUCE Modules\juce_audio_processors\utilities</Filter>
+    </ClInclude>
     <ClInclude Include="..\..\..\..\modules\juce_audio_processors\juce_audio_processors.h">
       <Filter>JUCE Modules\juce_audio_processors</Filter>
     </ClInclude>
diff --git a/examples/DemoRunner/Builds/VisualStudio2019/DemoRunner_App.vcxproj b/examples/DemoRunner/Builds/VisualStudio2019/DemoRunner_App.vcxproj
index a25b126d16..5ceac75b1e 100644
--- a/examples/DemoRunner/Builds/VisualStudio2019/DemoRunner_App.vcxproj
+++ b/examples/DemoRunner/Builds/VisualStudio2019/DemoRunner_App.vcxproj
@@ -2772,6 +2772,7 @@
     <ClInclude Include="..\..\..\..\modules\juce_audio_processors\processors\juce_AudioPluginInstance.h"/>
     <ClInclude Include="..\..\..\..\modules\juce_audio_processors\processors\juce_AudioProcessor.h"/>
     <ClInclude Include="..\..\..\..\modules\juce_audio_processors\processors\juce_AudioProcessorEditor.h"/>
+    <ClInclude Include="..\..\..\..\modules\juce_audio_processors\processors\juce_AudioProcessorEditorHostContext.h"/>
     <ClInclude Include="..\..\..\..\modules\juce_audio_processors\processors\juce_AudioProcessorGraph.h"/>
     <ClInclude Include="..\..\..\..\modules\juce_audio_processors\processors\juce_AudioProcessorListener.h"/>
     <ClInclude Include="..\..\..\..\modules\juce_audio_processors\processors\juce_AudioProcessorParameter.h"/>
@@ -2787,9 +2788,12 @@
     <ClInclude Include="..\..\..\..\modules\juce_audio_processors\utilities\juce_AudioParameterInt.h"/>
     <ClInclude Include="..\..\..\..\modules\juce_audio_processors\utilities\juce_AudioProcessorParameterWithID.h"/>
     <ClInclude Include="..\..\..\..\modules\juce_audio_processors\utilities\juce_AudioProcessorValueTreeState.h"/>
+    <ClInclude Include="..\..\..\..\modules\juce_audio_processors\utilities\juce_ExtensionsVisitor.h"/>
     <ClInclude Include="..\..\..\..\modules\juce_audio_processors\utilities\juce_ParameterAttachments.h"/>
     <ClInclude Include="..\..\..\..\modules\juce_audio_processors\utilities\juce_PluginHostType.h"/>
     <ClInclude Include="..\..\..\..\modules\juce_audio_processors\utilities\juce_RangedAudioParameter.h"/>
+    <ClInclude Include="..\..\..\..\modules\juce_audio_processors\utilities\juce_VST3ClientExtensions.h"/>
+    <ClInclude Include="..\..\..\..\modules\juce_audio_processors\utilities\juce_VSTCallbackHandler.h"/>
     <ClInclude Include="..\..\..\..\modules\juce_audio_processors\juce_audio_processors.h"/>
     <ClInclude Include="..\..\..\..\modules\juce_audio_utils\audio_cd\juce_AudioCDBurner.h"/>
     <ClInclude Include="..\..\..\..\modules\juce_audio_utils\audio_cd\juce_AudioCDReader.h"/>
diff --git a/examples/DemoRunner/Builds/VisualStudio2019/DemoRunner_App.vcxproj.filters b/examples/DemoRunner/Builds/VisualStudio2019/DemoRunner_App.vcxproj.filters
index b29ad81928..c08fa05f55 100644
--- a/examples/DemoRunner/Builds/VisualStudio2019/DemoRunner_App.vcxproj.filters
+++ b/examples/DemoRunner/Builds/VisualStudio2019/DemoRunner_App.vcxproj.filters
@@ -4008,6 +4008,9 @@
     <ClInclude Include="..\..\..\..\modules\juce_audio_processors\processors\juce_AudioProcessorEditor.h">
       <Filter>JUCE Modules\juce_audio_processors\processors</Filter>
     </ClInclude>
+    <ClInclude Include="..\..\..\..\modules\juce_audio_processors\processors\juce_AudioProcessorEditorHostContext.h">
+      <Filter>JUCE Modules\juce_audio_processors\processors</Filter>
+    </ClInclude>
     <ClInclude Include="..\..\..\..\modules\juce_audio_processors\processors\juce_AudioProcessorGraph.h">
       <Filter>JUCE Modules\juce_audio_processors\processors</Filter>
     </ClInclude>
@@ -4053,6 +4056,9 @@
     <ClInclude Include="..\..\..\..\modules\juce_audio_processors\utilities\juce_AudioProcessorValueTreeState.h">
       <Filter>JUCE Modules\juce_audio_processors\utilities</Filter>
     </ClInclude>
+    <ClInclude Include="..\..\..\..\modules\juce_audio_processors\utilities\juce_ExtensionsVisitor.h">
+      <Filter>JUCE Modules\juce_audio_processors\utilities</Filter>
+    </ClInclude>
     <ClInclude Include="..\..\..\..\modules\juce_audio_processors\utilities\juce_ParameterAttachments.h">
       <Filter>JUCE Modules\juce_audio_processors\utilities</Filter>
     </ClInclude>
@@ -4062,6 +4068,12 @@
     <ClInclude Include="..\..\..\..\modules\juce_audio_processors\utilities\juce_RangedAudioParameter.h">
       <Filter>JUCE Modules\juce_audio_processors\utilities</Filter>
     </ClInclude>
+    <ClInclude Include="..\..\..\..\modules\juce_audio_processors\utilities\juce_VST3ClientExtensions.h">
+      <Filter>JUCE Modules\juce_audio_processors\utilities</Filter>
+    </ClInclude>
+    <ClInclude Include="..\..\..\..\modules\juce_audio_processors\utilities\juce_VSTCallbackHandler.h">
+      <Filter>JUCE Modules\juce_audio_processors\utilities</Filter>
+    </ClInclude>
     <ClInclude Include="..\..\..\..\modules\juce_audio_processors\juce_audio_processors.h">
       <Filter>JUCE Modules\juce_audio_processors</Filter>
     </ClInclude>
diff --git a/extras/AudioPerformanceTest/Builds/Android/app/CMakeLists.txt b/extras/AudioPerformanceTest/Builds/Android/app/CMakeLists.txt
index 8eaddd5629..782bb7c8ec 100644
--- a/extras/AudioPerformanceTest/Builds/Android/app/CMakeLists.txt
+++ b/extras/AudioPerformanceTest/Builds/Android/app/CMakeLists.txt
@@ -566,6 +566,7 @@ add_library( ${BINARY_NAME}
     "../../../../../modules/juce_audio_processors/processors/juce_AudioProcessor.h"
     "../../../../../modules/juce_audio_processors/processors/juce_AudioProcessorEditor.cpp"
     "../../../../../modules/juce_audio_processors/processors/juce_AudioProcessorEditor.h"
+    "../../../../../modules/juce_audio_processors/processors/juce_AudioProcessorEditorHostContext.h"
     "../../../../../modules/juce_audio_processors/processors/juce_AudioProcessorGraph.cpp"
     "../../../../../modules/juce_audio_processors/processors/juce_AudioProcessorGraph.h"
     "../../../../../modules/juce_audio_processors/processors/juce_AudioProcessorListener.h"
@@ -594,12 +595,15 @@ add_library( ${BINARY_NAME}
     "../../../../../modules/juce_audio_processors/utilities/juce_AudioProcessorParameterWithID.h"
     "../../../../../modules/juce_audio_processors/utilities/juce_AudioProcessorValueTreeState.cpp"
     "../../../../../modules/juce_audio_processors/utilities/juce_AudioProcessorValueTreeState.h"
+    "../../../../../modules/juce_audio_processors/utilities/juce_ExtensionsVisitor.h"
     "../../../../../modules/juce_audio_processors/utilities/juce_ParameterAttachments.cpp"
     "../../../../../modules/juce_audio_processors/utilities/juce_ParameterAttachments.h"
     "../../../../../modules/juce_audio_processors/utilities/juce_PluginHostType.cpp"
     "../../../../../modules/juce_audio_processors/utilities/juce_PluginHostType.h"
     "../../../../../modules/juce_audio_processors/utilities/juce_RangedAudioParameter.cpp"
     "../../../../../modules/juce_audio_processors/utilities/juce_RangedAudioParameter.h"
+    "../../../../../modules/juce_audio_processors/utilities/juce_VST3ClientExtensions.h"
+    "../../../../../modules/juce_audio_processors/utilities/juce_VSTCallbackHandler.h"
     "../../../../../modules/juce_audio_processors/juce_audio_processors.cpp"
     "../../../../../modules/juce_audio_processors/juce_audio_processors.mm"
     "../../../../../modules/juce_audio_processors/juce_audio_processors.h"
@@ -2046,6 +2050,7 @@ set_source_files_properties("../../../../../modules/juce_audio_processors/proces
 set_source_files_properties("../../../../../modules/juce_audio_processors/processors/juce_AudioProcessor.h" PROPERTIES HEADER_FILE_ONLY TRUE)
 set_source_files_properties("../../../../../modules/juce_audio_processors/processors/juce_AudioProcessorEditor.cpp" PROPERTIES HEADER_FILE_ONLY TRUE)
 set_source_files_properties("../../../../../modules/juce_audio_processors/processors/juce_AudioProcessorEditor.h" PROPERTIES HEADER_FILE_ONLY TRUE)
+set_source_files_properties("../../../../../modules/juce_audio_processors/processors/juce_AudioProcessorEditorHostContext.h" PROPERTIES HEADER_FILE_ONLY TRUE)
 set_source_files_properties("../../../../../modules/juce_audio_processors/processors/juce_AudioProcessorGraph.cpp" PROPERTIES HEADER_FILE_ONLY TRUE)
 set_source_files_properties("../../../../../modules/juce_audio_processors/processors/juce_AudioProcessorGraph.h" PROPERTIES HEADER_FILE_ONLY TRUE)
 set_source_files_properties("../../../../../modules/juce_audio_processors/processors/juce_AudioProcessorListener.h" PROPERTIES HEADER_FILE_ONLY TRUE)
@@ -2074,12 +2079,15 @@ set_source_files_properties("../../../../../modules/juce_audio_processors/utilit
 set_source_files_properties("../../../../../modules/juce_audio_processors/utilities/juce_AudioProcessorParameterWithID.h" PROPERTIES HEADER_FILE_ONLY TRUE)
 set_source_files_properties("../../../../../modules/juce_audio_processors/utilities/juce_AudioProcessorValueTreeState.cpp" PROPERTIES HEADER_FILE_ONLY TRUE)
 set_source_files_properties("../../../../../modules/juce_audio_processors/utilities/juce_AudioProcessorValueTreeState.h" PROPERTIES HEADER_FILE_ONLY TRUE)
+set_source_files_properties("../../../../../modules/juce_audio_processors/utilities/juce_ExtensionsVisitor.h" PROPERTIES HEADER_FILE_ONLY TRUE)
 set_source_files_properties("../../../../../modules/juce_audio_processors/utilities/juce_ParameterAttachments.cpp" PROPERTIES HEADER_FILE_ONLY TRUE)
 set_source_files_properties("../../../../../modules/juce_audio_processors/utilities/juce_ParameterAttachments.h" PROPERTIES HEADER_FILE_ONLY TRUE)
 set_source_files_properties("../../../../../modules/juce_audio_processors/utilities/juce_PluginHostType.cpp" PROPERTIES HEADER_FILE_ONLY TRUE)
 set_source_files_properties("../../../../../modules/juce_audio_processors/utilities/juce_PluginHostType.h" PROPERTIES HEADER_FILE_ONLY TRUE)
 set_source_files_properties("../../../../../modules/juce_audio_processors/utilities/juce_RangedAudioParameter.cpp" PROPERTIES HEADER_FILE_ONLY TRUE)
 set_source_files_properties("../../../../../modules/juce_audio_processors/utilities/juce_RangedAudioParameter.h" PROPERTIES HEADER_FILE_ONLY TRUE)
+set_source_files_properties("../../../../../modules/juce_audio_processors/utilities/juce_VST3ClientExtensions.h" PROPERTIES HEADER_FILE_ONLY TRUE)
+set_source_files_properties("../../../../../modules/juce_audio_processors/utilities/juce_VSTCallbackHandler.h" PROPERTIES HEADER_FILE_ONLY TRUE)
 set_source_files_properties("../../../../../modules/juce_audio_processors/juce_audio_processors.cpp" PROPERTIES HEADER_FILE_ONLY TRUE)
 set_source_files_properties("../../../../../modules/juce_audio_processors/juce_audio_processors.mm" PROPERTIES HEADER_FILE_ONLY TRUE)
 set_source_files_properties("../../../../../modules/juce_audio_processors/juce_audio_processors.h" PROPERTIES HEADER_FILE_ONLY TRUE)
diff --git a/extras/AudioPerformanceTest/Builds/VisualStudio2019/AudioPerformanceTest_App.vcxproj b/extras/AudioPerformanceTest/Builds/VisualStudio2019/AudioPerformanceTest_App.vcxproj
index 7bc8bd296b..932a463687 100644
--- a/extras/AudioPerformanceTest/Builds/VisualStudio2019/AudioPerformanceTest_App.vcxproj
+++ b/extras/AudioPerformanceTest/Builds/VisualStudio2019/AudioPerformanceTest_App.vcxproj
@@ -2373,6 +2373,7 @@
     <ClInclude Include="..\..\..\..\modules\juce_audio_processors\processors\juce_AudioPluginInstance.h"/>
     <ClInclude Include="..\..\..\..\modules\juce_audio_processors\processors\juce_AudioProcessor.h"/>
     <ClInclude Include="..\..\..\..\modules\juce_audio_processors\processors\juce_AudioProcessorEditor.h"/>
+    <ClInclude Include="..\..\..\..\modules\juce_audio_processors\processors\juce_AudioProcessorEditorHostContext.h"/>
     <ClInclude Include="..\..\..\..\modules\juce_audio_processors\processors\juce_AudioProcessorGraph.h"/>
     <ClInclude Include="..\..\..\..\modules\juce_audio_processors\processors\juce_AudioProcessorListener.h"/>
     <ClInclude Include="..\..\..\..\modules\juce_audio_processors\processors\juce_AudioProcessorParameter.h"/>
@@ -2388,9 +2389,12 @@
     <ClInclude Include="..\..\..\..\modules\juce_audio_processors\utilities\juce_AudioParameterInt.h"/>
     <ClInclude Include="..\..\..\..\modules\juce_audio_processors\utilities\juce_AudioProcessorParameterWithID.h"/>
     <ClInclude Include="..\..\..\..\modules\juce_audio_processors\utilities\juce_AudioProcessorValueTreeState.h"/>
+    <ClInclude Include="..\..\..\..\modules\juce_audio_processors\utilities\juce_ExtensionsVisitor.h"/>
     <ClInclude Include="..\..\..\..\modules\juce_audio_processors\utilities\juce_ParameterAttachments.h"/>
     <ClInclude Include="..\..\..\..\modules\juce_audio_processors\utilities\juce_PluginHostType.h"/>
     <ClInclude Include="..\..\..\..\modules\juce_audio_processors\utilities\juce_RangedAudioParameter.h"/>
+    <ClInclude Include="..\..\..\..\modules\juce_audio_processors\utilities\juce_VST3ClientExtensions.h"/>
+    <ClInclude Include="..\..\..\..\modules\juce_audio_processors\utilities\juce_VSTCallbackHandler.h"/>
     <ClInclude Include="..\..\..\..\modules\juce_audio_processors\juce_audio_processors.h"/>
     <ClInclude Include="..\..\..\..\modules\juce_audio_utils\audio_cd\juce_AudioCDBurner.h"/>
     <ClInclude Include="..\..\..\..\modules\juce_audio_utils\audio_cd\juce_AudioCDReader.h"/>
diff --git a/extras/AudioPerformanceTest/Builds/VisualStudio2019/AudioPerformanceTest_App.vcxproj.filters b/extras/AudioPerformanceTest/Builds/VisualStudio2019/AudioPerformanceTest_App.vcxproj.filters
index 01d914f6e3..169038e38e 100644
--- a/extras/AudioPerformanceTest/Builds/VisualStudio2019/AudioPerformanceTest_App.vcxproj.filters
+++ b/extras/AudioPerformanceTest/Builds/VisualStudio2019/AudioPerformanceTest_App.vcxproj.filters
@@ -3429,6 +3429,9 @@
     <ClInclude Include="..\..\..\..\modules\juce_audio_processors\processors\juce_AudioProcessorEditor.h">
       <Filter>JUCE Modules\juce_audio_processors\processors</Filter>
     </ClInclude>
+    <ClInclude Include="..\..\..\..\modules\juce_audio_processors\processors\juce_AudioProcessorEditorHostContext.h">
+      <Filter>JUCE Modules\juce_audio_processors\processors</Filter>
+    </ClInclude>
     <ClInclude Include="..\..\..\..\modules\juce_audio_processors\processors\juce_AudioProcessorGraph.h">
       <Filter>JUCE Modules\juce_audio_processors\processors</Filter>
     </ClInclude>
@@ -3474,6 +3477,9 @@
     <ClInclude Include="..\..\..\..\modules\juce_audio_processors\utilities\juce_AudioProcessorValueTreeState.h">
       <Filter>JUCE Modules\juce_audio_processors\utilities</Filter>
     </ClInclude>
+    <ClInclude Include="..\..\..\..\modules\juce_audio_processors\utilities\juce_ExtensionsVisitor.h">
+      <Filter>JUCE Modules\juce_audio_processors\utilities</Filter>
+    </ClInclude>
     <ClInclude Include="..\..\..\..\modules\juce_audio_processors\utilities\juce_ParameterAttachments.h">
       <Filter>JUCE Modules\juce_audio_processors\utilities</Filter>
     </ClInclude>
@@ -3483,6 +3489,12 @@
     <ClInclude Include="..\..\..\..\modules\juce_audio_processors\utilities\juce_RangedAudioParameter.h">
       <Filter>JUCE Modules\juce_audio_processors\utilities</Filter>
     </ClInclude>
+    <ClInclude Include="..\..\..\..\modules\juce_audio_processors\utilities\juce_VST3ClientExtensions.h">
+      <Filter>JUCE Modules\juce_audio_processors\utilities</Filter>
+    </ClInclude>
+    <ClInclude Include="..\..\..\..\modules\juce_audio_processors\utilities\juce_VSTCallbackHandler.h">
+      <Filter>JUCE Modules\juce_audio_processors\utilities</Filter>
+    </ClInclude>
     <ClInclude Include="..\..\..\..\modules\juce_audio_processors\juce_audio_processors.h">
       <Filter>JUCE Modules\juce_audio_processors</Filter>
     </ClInclude>
diff --git a/extras/AudioPluginHost/Builds/Android/app/CMakeLists.txt b/extras/AudioPluginHost/Builds/Android/app/CMakeLists.txt
index 52747c7889..7c872bcd89 100644
--- a/extras/AudioPluginHost/Builds/Android/app/CMakeLists.txt
+++ b/extras/AudioPluginHost/Builds/Android/app/CMakeLists.txt
@@ -583,6 +583,7 @@ add_library( ${BINARY_NAME}
     "../../../../../modules/juce_audio_processors/processors/juce_AudioProcessor.h"
     "../../../../../modules/juce_audio_processors/processors/juce_AudioProcessorEditor.cpp"
     "../../../../../modules/juce_audio_processors/processors/juce_AudioProcessorEditor.h"
+    "../../../../../modules/juce_audio_processors/processors/juce_AudioProcessorEditorHostContext.h"
     "../../../../../modules/juce_audio_processors/processors/juce_AudioProcessorGraph.cpp"
     "../../../../../modules/juce_audio_processors/processors/juce_AudioProcessorGraph.h"
     "../../../../../modules/juce_audio_processors/processors/juce_AudioProcessorListener.h"
@@ -611,12 +612,15 @@ add_library( ${BINARY_NAME}
     "../../../../../modules/juce_audio_processors/utilities/juce_AudioProcessorParameterWithID.h"
     "../../../../../modules/juce_audio_processors/utilities/juce_AudioProcessorValueTreeState.cpp"
     "../../../../../modules/juce_audio_processors/utilities/juce_AudioProcessorValueTreeState.h"
+    "../../../../../modules/juce_audio_processors/utilities/juce_ExtensionsVisitor.h"
     "../../../../../modules/juce_audio_processors/utilities/juce_ParameterAttachments.cpp"
     "../../../../../modules/juce_audio_processors/utilities/juce_ParameterAttachments.h"
     "../../../../../modules/juce_audio_processors/utilities/juce_PluginHostType.cpp"
     "../../../../../modules/juce_audio_processors/utilities/juce_PluginHostType.h"
     "../../../../../modules/juce_audio_processors/utilities/juce_RangedAudioParameter.cpp"
     "../../../../../modules/juce_audio_processors/utilities/juce_RangedAudioParameter.h"
+    "../../../../../modules/juce_audio_processors/utilities/juce_VST3ClientExtensions.h"
+    "../../../../../modules/juce_audio_processors/utilities/juce_VSTCallbackHandler.h"
     "../../../../../modules/juce_audio_processors/juce_audio_processors.cpp"
     "../../../../../modules/juce_audio_processors/juce_audio_processors.mm"
     "../../../../../modules/juce_audio_processors/juce_audio_processors.h"
@@ -2211,6 +2215,7 @@ set_source_files_properties("../../../../../modules/juce_audio_processors/proces
 set_source_files_properties("../../../../../modules/juce_audio_processors/processors/juce_AudioProcessor.h" PROPERTIES HEADER_FILE_ONLY TRUE)
 set_source_files_properties("../../../../../modules/juce_audio_processors/processors/juce_AudioProcessorEditor.cpp" PROPERTIES HEADER_FILE_ONLY TRUE)
 set_source_files_properties("../../../../../modules/juce_audio_processors/processors/juce_AudioProcessorEditor.h" PROPERTIES HEADER_FILE_ONLY TRUE)
+set_source_files_properties("../../../../../modules/juce_audio_processors/processors/juce_AudioProcessorEditorHostContext.h" PROPERTIES HEADER_FILE_ONLY TRUE)
 set_source_files_properties("../../../../../modules/juce_audio_processors/processors/juce_AudioProcessorGraph.cpp" PROPERTIES HEADER_FILE_ONLY TRUE)
 set_source_files_properties("../../../../../modules/juce_audio_processors/processors/juce_AudioProcessorGraph.h" PROPERTIES HEADER_FILE_ONLY TRUE)
 set_source_files_properties("../../../../../modules/juce_audio_processors/processors/juce_AudioProcessorListener.h" PROPERTIES HEADER_FILE_ONLY TRUE)
@@ -2239,12 +2244,15 @@ set_source_files_properties("../../../../../modules/juce_audio_processors/utilit
 set_source_files_properties("../../../../../modules/juce_audio_processors/utilities/juce_AudioProcessorParameterWithID.h" PROPERTIES HEADER_FILE_ONLY TRUE)
 set_source_files_properties("../../../../../modules/juce_audio_processors/utilities/juce_AudioProcessorValueTreeState.cpp" PROPERTIES HEADER_FILE_ONLY TRUE)
 set_source_files_properties("../../../../../modules/juce_audio_processors/utilities/juce_AudioProcessorValueTreeState.h" PROPERTIES HEADER_FILE_ONLY TRUE)
+set_source_files_properties("../../../../../modules/juce_audio_processors/utilities/juce_ExtensionsVisitor.h" PROPERTIES HEADER_FILE_ONLY TRUE)
 set_source_files_properties("../../../../../modules/juce_audio_processors/utilities/juce_ParameterAttachments.cpp" PROPERTIES HEADER_FILE_ONLY TRUE)
 set_source_files_properties("../../../../../modules/juce_audio_processors/utilities/juce_ParameterAttachments.h" PROPERTIES HEADER_FILE_ONLY TRUE)
 set_source_files_properties("../../../../../modules/juce_audio_processors/utilities/juce_PluginHostType.cpp" PROPERTIES HEADER_FILE_ONLY TRUE)
 set_source_files_properties("../../../../../modules/juce_audio_processors/utilities/juce_PluginHostType.h" PROPERTIES HEADER_FILE_ONLY TRUE)
 set_source_files_properties("../../../../../modules/juce_audio_processors/utilities/juce_RangedAudioParameter.cpp" PROPERTIES HEADER_FILE_ONLY TRUE)
 set_source_files_properties("../../../../../modules/juce_audio_processors/utilities/juce_RangedAudioParameter.h" PROPERTIES HEADER_FILE_ONLY TRUE)
+set_source_files_properties("../../../../../modules/juce_audio_processors/utilities/juce_VST3ClientExtensions.h" PROPERTIES HEADER_FILE_ONLY TRUE)
+set_source_files_properties("../../../../../modules/juce_audio_processors/utilities/juce_VSTCallbackHandler.h" PROPERTIES HEADER_FILE_ONLY TRUE)
 set_source_files_properties("../../../../../modules/juce_audio_processors/juce_audio_processors.cpp" PROPERTIES HEADER_FILE_ONLY TRUE)
 set_source_files_properties("../../../../../modules/juce_audio_processors/juce_audio_processors.mm" PROPERTIES HEADER_FILE_ONLY TRUE)
 set_source_files_properties("../../../../../modules/juce_audio_processors/juce_audio_processors.h" PROPERTIES HEADER_FILE_ONLY TRUE)
diff --git a/extras/AudioPluginHost/Builds/VisualStudio2015/AudioPluginHost_App.vcxproj b/extras/AudioPluginHost/Builds/VisualStudio2015/AudioPluginHost_App.vcxproj
index 65cd747a4a..716b79ace6 100644
--- a/extras/AudioPluginHost/Builds/VisualStudio2015/AudioPluginHost_App.vcxproj
+++ b/extras/AudioPluginHost/Builds/VisualStudio2015/AudioPluginHost_App.vcxproj
@@ -2554,6 +2554,7 @@
     <ClInclude Include="..\..\..\..\modules\juce_audio_processors\processors\juce_AudioPluginInstance.h"/>
     <ClInclude Include="..\..\..\..\modules\juce_audio_processors\processors\juce_AudioProcessor.h"/>
     <ClInclude Include="..\..\..\..\modules\juce_audio_processors\processors\juce_AudioProcessorEditor.h"/>
+    <ClInclude Include="..\..\..\..\modules\juce_audio_processors\processors\juce_AudioProcessorEditorHostContext.h"/>
     <ClInclude Include="..\..\..\..\modules\juce_audio_processors\processors\juce_AudioProcessorGraph.h"/>
     <ClInclude Include="..\..\..\..\modules\juce_audio_processors\processors\juce_AudioProcessorListener.h"/>
     <ClInclude Include="..\..\..\..\modules\juce_audio_processors\processors\juce_AudioProcessorParameter.h"/>
@@ -2569,9 +2570,12 @@
     <ClInclude Include="..\..\..\..\modules\juce_audio_processors\utilities\juce_AudioParameterInt.h"/>
     <ClInclude Include="..\..\..\..\modules\juce_audio_processors\utilities\juce_AudioProcessorParameterWithID.h"/>
     <ClInclude Include="..\..\..\..\modules\juce_audio_processors\utilities\juce_AudioProcessorValueTreeState.h"/>
+    <ClInclude Include="..\..\..\..\modules\juce_audio_processors\utilities\juce_ExtensionsVisitor.h"/>
     <ClInclude Include="..\..\..\..\modules\juce_audio_processors\utilities\juce_ParameterAttachments.h"/>
     <ClInclude Include="..\..\..\..\modules\juce_audio_processors\utilities\juce_PluginHostType.h"/>
     <ClInclude Include="..\..\..\..\modules\juce_audio_processors\utilities\juce_RangedAudioParameter.h"/>
+    <ClInclude Include="..\..\..\..\modules\juce_audio_processors\utilities\juce_VST3ClientExtensions.h"/>
+    <ClInclude Include="..\..\..\..\modules\juce_audio_processors\utilities\juce_VSTCallbackHandler.h"/>
     <ClInclude Include="..\..\..\..\modules\juce_audio_processors\juce_audio_processors.h"/>
     <ClInclude Include="..\..\..\..\modules\juce_audio_utils\audio_cd\juce_AudioCDBurner.h"/>
     <ClInclude Include="..\..\..\..\modules\juce_audio_utils\audio_cd\juce_AudioCDReader.h"/>
diff --git a/extras/AudioPluginHost/Builds/VisualStudio2015/AudioPluginHost_App.vcxproj.filters b/extras/AudioPluginHost/Builds/VisualStudio2015/AudioPluginHost_App.vcxproj.filters
index b88ea2193a..76e7cf1914 100644
--- a/extras/AudioPluginHost/Builds/VisualStudio2015/AudioPluginHost_App.vcxproj.filters
+++ b/extras/AudioPluginHost/Builds/VisualStudio2015/AudioPluginHost_App.vcxproj.filters
@@ -3699,6 +3699,9 @@
     <ClInclude Include="..\..\..\..\modules\juce_audio_processors\processors\juce_AudioProcessorEditor.h">
       <Filter>JUCE Modules\juce_audio_processors\processors</Filter>
     </ClInclude>
+    <ClInclude Include="..\..\..\..\modules\juce_audio_processors\processors\juce_AudioProcessorEditorHostContext.h">
+      <Filter>JUCE Modules\juce_audio_processors\processors</Filter>
+    </ClInclude>
     <ClInclude Include="..\..\..\..\modules\juce_audio_processors\processors\juce_AudioProcessorGraph.h">
       <Filter>JUCE Modules\juce_audio_processors\processors</Filter>
     </ClInclude>
@@ -3744,6 +3747,9 @@
     <ClInclude Include="..\..\..\..\modules\juce_audio_processors\utilities\juce_AudioProcessorValueTreeState.h">
       <Filter>JUCE Modules\juce_audio_processors\utilities</Filter>
     </ClInclude>
+    <ClInclude Include="..\..\..\..\modules\juce_audio_processors\utilities\juce_ExtensionsVisitor.h">
+      <Filter>JUCE Modules\juce_audio_processors\utilities</Filter>
+    </ClInclude>
     <ClInclude Include="..\..\..\..\modules\juce_audio_processors\utilities\juce_ParameterAttachments.h">
       <Filter>JUCE Modules\juce_audio_processors\utilities</Filter>
     </ClInclude>
@@ -3753,6 +3759,12 @@
     <ClInclude Include="..\..\..\..\modules\juce_audio_processors\utilities\juce_RangedAudioParameter.h">
       <Filter>JUCE Modules\juce_audio_processors\utilities</Filter>
     </ClInclude>
+    <ClInclude Include="..\..\..\..\modules\juce_audio_processors\utilities\juce_VST3ClientExtensions.h">
+      <Filter>JUCE Modules\juce_audio_processors\utilities</Filter>
+    </ClInclude>
+    <ClInclude Include="..\..\..\..\modules\juce_audio_processors\utilities\juce_VSTCallbackHandler.h">
+      <Filter>JUCE Modules\juce_audio_processors\utilities</Filter>
+    </ClInclude>
     <ClInclude Include="..\..\..\..\modules\juce_audio_processors\juce_audio_processors.h">
       <Filter>JUCE Modules\juce_audio_processors</Filter>
     </ClInclude>
diff --git a/extras/AudioPluginHost/Builds/VisualStudio2017/AudioPluginHost_App.vcxproj b/extras/AudioPluginHost/Builds/VisualStudio2017/AudioPluginHost_App.vcxproj
index aa80aacbcb..7823949ea9 100644
--- a/extras/AudioPluginHost/Builds/VisualStudio2017/AudioPluginHost_App.vcxproj
+++ b/extras/AudioPluginHost/Builds/VisualStudio2017/AudioPluginHost_App.vcxproj
@@ -2554,6 +2554,7 @@
     <ClInclude Include="..\..\..\..\modules\juce_audio_processors\processors\juce_AudioPluginInstance.h"/>
     <ClInclude Include="..\..\..\..\modules\juce_audio_processors\processors\juce_AudioProcessor.h"/>
     <ClInclude Include="..\..\..\..\modules\juce_audio_processors\processors\juce_AudioProcessorEditor.h"/>
+    <ClInclude Include="..\..\..\..\modules\juce_audio_processors\processors\juce_AudioProcessorEditorHostContext.h"/>
     <ClInclude Include="..\..\..\..\modules\juce_audio_processors\processors\juce_AudioProcessorGraph.h"/>
     <ClInclude Include="..\..\..\..\modules\juce_audio_processors\processors\juce_AudioProcessorListener.h"/>
     <ClInclude Include="..\..\..\..\modules\juce_audio_processors\processors\juce_AudioProcessorParameter.h"/>
@@ -2569,9 +2570,12 @@
     <ClInclude Include="..\..\..\..\modules\juce_audio_processors\utilities\juce_AudioParameterInt.h"/>
     <ClInclude Include="..\..\..\..\modules\juce_audio_processors\utilities\juce_AudioProcessorParameterWithID.h"/>
     <ClInclude Include="..\..\..\..\modules\juce_audio_processors\utilities\juce_AudioProcessorValueTreeState.h"/>
+    <ClInclude Include="..\..\..\..\modules\juce_audio_processors\utilities\juce_ExtensionsVisitor.h"/>
     <ClInclude Include="..\..\..\..\modules\juce_audio_processors\utilities\juce_ParameterAttachments.h"/>
     <ClInclude Include="..\..\..\..\modules\juce_audio_processors\utilities\juce_PluginHostType.h"/>
     <ClInclude Include="..\..\..\..\modules\juce_audio_processors\utilities\juce_RangedAudioParameter.h"/>
+    <ClInclude Include="..\..\..\..\modules\juce_audio_processors\utilities\juce_VST3ClientExtensions.h"/>
+    <ClInclude Include="..\..\..\..\modules\juce_audio_processors\utilities\juce_VSTCallbackHandler.h"/>
     <ClInclude Include="..\..\..\..\modules\juce_audio_processors\juce_audio_processors.h"/>
     <ClInclude Include="..\..\..\..\modules\juce_audio_utils\audio_cd\juce_AudioCDBurner.h"/>
     <ClInclude Include="..\..\..\..\modules\juce_audio_utils\audio_cd\juce_AudioCDReader.h"/>
diff --git a/extras/AudioPluginHost/Builds/VisualStudio2017/AudioPluginHost_App.vcxproj.filters b/extras/AudioPluginHost/Builds/VisualStudio2017/AudioPluginHost_App.vcxproj.filters
index bd7e7df14e..d485aba735 100644
--- a/extras/AudioPluginHost/Builds/VisualStudio2017/AudioPluginHost_App.vcxproj.filters
+++ b/extras/AudioPluginHost/Builds/VisualStudio2017/AudioPluginHost_App.vcxproj.filters
@@ -3699,6 +3699,9 @@
     <ClInclude Include="..\..\..\..\modules\juce_audio_processors\processors\juce_AudioProcessorEditor.h">
       <Filter>JUCE Modules\juce_audio_processors\processors</Filter>
     </ClInclude>
+    <ClInclude Include="..\..\..\..\modules\juce_audio_processors\processors\juce_AudioProcessorEditorHostContext.h">
+      <Filter>JUCE Modules\juce_audio_processors\processors</Filter>
+    </ClInclude>
     <ClInclude Include="..\..\..\..\modules\juce_audio_processors\processors\juce_AudioProcessorGraph.h">
       <Filter>JUCE Modules\juce_audio_processors\processors</Filter>
     </ClInclude>
@@ -3744,6 +3747,9 @@
     <ClInclude Include="..\..\..\..\modules\juce_audio_processors\utilities\juce_AudioProcessorValueTreeState.h">
       <Filter>JUCE Modules\juce_audio_processors\utilities</Filter>
     </ClInclude>
+    <ClInclude Include="..\..\..\..\modules\juce_audio_processors\utilities\juce_ExtensionsVisitor.h">
+      <Filter>JUCE Modules\juce_audio_processors\utilities</Filter>
+    </ClInclude>
     <ClInclude Include="..\..\..\..\modules\juce_audio_processors\utilities\juce_ParameterAttachments.h">
       <Filter>JUCE Modules\juce_audio_processors\utilities</Filter>
     </ClInclude>
@@ -3753,6 +3759,12 @@
     <ClInclude Include="..\..\..\..\modules\juce_audio_processors\utilities\juce_RangedAudioParameter.h">
       <Filter>JUCE Modules\juce_audio_processors\utilities</Filter>
     </ClInclude>
+    <ClInclude Include="..\..\..\..\modules\juce_audio_processors\utilities\juce_VST3ClientExtensions.h">
+      <Filter>JUCE Modules\juce_audio_processors\utilities</Filter>
+    </ClInclude>
+    <ClInclude Include="..\..\..\..\modules\juce_audio_processors\utilities\juce_VSTCallbackHandler.h">
+      <Filter>JUCE Modules\juce_audio_processors\utilities</Filter>
+    </ClInclude>
     <ClInclude Include="..\..\..\..\modules\juce_audio_processors\juce_audio_processors.h">
       <Filter>JUCE Modules\juce_audio_processors</Filter>
     </ClInclude>
diff --git a/extras/AudioPluginHost/Builds/VisualStudio2019/AudioPluginHost_App.vcxproj b/extras/AudioPluginHost/Builds/VisualStudio2019/AudioPluginHost_App.vcxproj
index abbe265556..e980225869 100644
--- a/extras/AudioPluginHost/Builds/VisualStudio2019/AudioPluginHost_App.vcxproj
+++ b/extras/AudioPluginHost/Builds/VisualStudio2019/AudioPluginHost_App.vcxproj
@@ -2554,6 +2554,7 @@
     <ClInclude Include="..\..\..\..\modules\juce_audio_processors\processors\juce_AudioPluginInstance.h"/>
     <ClInclude Include="..\..\..\..\modules\juce_audio_processors\processors\juce_AudioProcessor.h"/>
     <ClInclude Include="..\..\..\..\modules\juce_audio_processors\processors\juce_AudioProcessorEditor.h"/>
+    <ClInclude Include="..\..\..\..\modules\juce_audio_processors\processors\juce_AudioProcessorEditorHostContext.h"/>
     <ClInclude Include="..\..\..\..\modules\juce_audio_processors\processors\juce_AudioProcessorGraph.h"/>
     <ClInclude Include="..\..\..\..\modules\juce_audio_processors\processors\juce_AudioProcessorListener.h"/>
     <ClInclude Include="..\..\..\..\modules\juce_audio_processors\processors\juce_AudioProcessorParameter.h"/>
@@ -2569,9 +2570,12 @@
     <ClInclude Include="..\..\..\..\modules\juce_audio_processors\utilities\juce_AudioParameterInt.h"/>
     <ClInclude Include="..\..\..\..\modules\juce_audio_processors\utilities\juce_AudioProcessorParameterWithID.h"/>
     <ClInclude Include="..\..\..\..\modules\juce_audio_processors\utilities\juce_AudioProcessorValueTreeState.h"/>
+    <ClInclude Include="..\..\..\..\modules\juce_audio_processors\utilities\juce_ExtensionsVisitor.h"/>
     <ClInclude Include="..\..\..\..\modules\juce_audio_processors\utilities\juce_ParameterAttachments.h"/>
     <ClInclude Include="..\..\..\..\modules\juce_audio_processors\utilities\juce_PluginHostType.h"/>
     <ClInclude Include="..\..\..\..\modules\juce_audio_processors\utilities\juce_RangedAudioParameter.h"/>
+    <ClInclude Include="..\..\..\..\modules\juce_audio_processors\utilities\juce_VST3ClientExtensions.h"/>
+    <ClInclude Include="..\..\..\..\modules\juce_audio_processors\utilities\juce_VSTCallbackHandler.h"/>
     <ClInclude Include="..\..\..\..\modules\juce_audio_processors\juce_audio_processors.h"/>
     <ClInclude Include="..\..\..\..\modules\juce_audio_utils\audio_cd\juce_AudioCDBurner.h"/>
     <ClInclude Include="..\..\..\..\modules\juce_audio_utils\audio_cd\juce_AudioCDReader.h"/>
diff --git a/extras/AudioPluginHost/Builds/VisualStudio2019/AudioPluginHost_App.vcxproj.filters b/extras/AudioPluginHost/Builds/VisualStudio2019/AudioPluginHost_App.vcxproj.filters
index 485076ab92..e1ea17cf62 100644
--- a/extras/AudioPluginHost/Builds/VisualStudio2019/AudioPluginHost_App.vcxproj.filters
+++ b/extras/AudioPluginHost/Builds/VisualStudio2019/AudioPluginHost_App.vcxproj.filters
@@ -3699,6 +3699,9 @@
     <ClInclude Include="..\..\..\..\modules\juce_audio_processors\processors\juce_AudioProcessorEditor.h">
       <Filter>JUCE Modules\juce_audio_processors\processors</Filter>
     </ClInclude>
+    <ClInclude Include="..\..\..\..\modules\juce_audio_processors\processors\juce_AudioProcessorEditorHostContext.h">
+      <Filter>JUCE Modules\juce_audio_processors\processors</Filter>
+    </ClInclude>
     <ClInclude Include="..\..\..\..\modules\juce_audio_processors\processors\juce_AudioProcessorGraph.h">
       <Filter>JUCE Modules\juce_audio_processors\processors</Filter>
     </ClInclude>
@@ -3744,6 +3747,9 @@
     <ClInclude Include="..\..\..\..\modules\juce_audio_processors\utilities\juce_AudioProcessorValueTreeState.h">
       <Filter>JUCE Modules\juce_audio_processors\utilities</Filter>
     </ClInclude>
+    <ClInclude Include="..\..\..\..\modules\juce_audio_processors\utilities\juce_ExtensionsVisitor.h">
+      <Filter>JUCE Modules\juce_audio_processors\utilities</Filter>
+    </ClInclude>
     <ClInclude Include="..\..\..\..\modules\juce_audio_processors\utilities\juce_ParameterAttachments.h">
       <Filter>JUCE Modules\juce_audio_processors\utilities</Filter>
     </ClInclude>
@@ -3753,6 +3759,12 @@
     <ClInclude Include="..\..\..\..\modules\juce_audio_processors\utilities\juce_RangedAudioParameter.h">
       <Filter>JUCE Modules\juce_audio_processors\utilities</Filter>
     </ClInclude>
+    <ClInclude Include="..\..\..\..\modules\juce_audio_processors\utilities\juce_VST3ClientExtensions.h">
+      <Filter>JUCE Modules\juce_audio_processors\utilities</Filter>
+    </ClInclude>
+    <ClInclude Include="..\..\..\..\modules\juce_audio_processors\utilities\juce_VSTCallbackHandler.h">
+      <Filter>JUCE Modules\juce_audio_processors\utilities</Filter>
+    </ClInclude>
     <ClInclude Include="..\..\..\..\modules\juce_audio_processors\juce_audio_processors.h">
       <Filter>JUCE Modules\juce_audio_processors</Filter>
     </ClInclude>
diff --git a/extras/NetworkGraphicsDemo/Builds/Android/app/CMakeLists.txt b/extras/NetworkGraphicsDemo/Builds/Android/app/CMakeLists.txt
index a3caea7783..5ccce8cacc 100644
--- a/extras/NetworkGraphicsDemo/Builds/Android/app/CMakeLists.txt
+++ b/extras/NetworkGraphicsDemo/Builds/Android/app/CMakeLists.txt
@@ -570,6 +570,7 @@ add_library( ${BINARY_NAME}
     "../../../../../modules/juce_audio_processors/processors/juce_AudioProcessor.h"
     "../../../../../modules/juce_audio_processors/processors/juce_AudioProcessorEditor.cpp"
     "../../../../../modules/juce_audio_processors/processors/juce_AudioProcessorEditor.h"
+    "../../../../../modules/juce_audio_processors/processors/juce_AudioProcessorEditorHostContext.h"
     "../../../../../modules/juce_audio_processors/processors/juce_AudioProcessorGraph.cpp"
     "../../../../../modules/juce_audio_processors/processors/juce_AudioProcessorGraph.h"
     "../../../../../modules/juce_audio_processors/processors/juce_AudioProcessorListener.h"
@@ -598,12 +599,15 @@ add_library( ${BINARY_NAME}
     "../../../../../modules/juce_audio_processors/utilities/juce_AudioProcessorParameterWithID.h"
     "../../../../../modules/juce_audio_processors/utilities/juce_AudioProcessorValueTreeState.cpp"
     "../../../../../modules/juce_audio_processors/utilities/juce_AudioProcessorValueTreeState.h"
+    "../../../../../modules/juce_audio_processors/utilities/juce_ExtensionsVisitor.h"
     "../../../../../modules/juce_audio_processors/utilities/juce_ParameterAttachments.cpp"
     "../../../../../modules/juce_audio_processors/utilities/juce_ParameterAttachments.h"
     "../../../../../modules/juce_audio_processors/utilities/juce_PluginHostType.cpp"
     "../../../../../modules/juce_audio_processors/utilities/juce_PluginHostType.h"
     "../../../../../modules/juce_audio_processors/utilities/juce_RangedAudioParameter.cpp"
     "../../../../../modules/juce_audio_processors/utilities/juce_RangedAudioParameter.h"
+    "../../../../../modules/juce_audio_processors/utilities/juce_VST3ClientExtensions.h"
+    "../../../../../modules/juce_audio_processors/utilities/juce_VSTCallbackHandler.h"
     "../../../../../modules/juce_audio_processors/juce_audio_processors.cpp"
     "../../../../../modules/juce_audio_processors/juce_audio_processors.mm"
     "../../../../../modules/juce_audio_processors/juce_audio_processors.h"
@@ -2130,6 +2134,7 @@ set_source_files_properties("../../../../../modules/juce_audio_processors/proces
 set_source_files_properties("../../../../../modules/juce_audio_processors/processors/juce_AudioProcessor.h" PROPERTIES HEADER_FILE_ONLY TRUE)
 set_source_files_properties("../../../../../modules/juce_audio_processors/processors/juce_AudioProcessorEditor.cpp" PROPERTIES HEADER_FILE_ONLY TRUE)
 set_source_files_properties("../../../../../modules/juce_audio_processors/processors/juce_AudioProcessorEditor.h" PROPERTIES HEADER_FILE_ONLY TRUE)
+set_source_files_properties("../../../../../modules/juce_audio_processors/processors/juce_AudioProcessorEditorHostContext.h" PROPERTIES HEADER_FILE_ONLY TRUE)
 set_source_files_properties("../../../../../modules/juce_audio_processors/processors/juce_AudioProcessorGraph.cpp" PROPERTIES HEADER_FILE_ONLY TRUE)
 set_source_files_properties("../../../../../modules/juce_audio_processors/processors/juce_AudioProcessorGraph.h" PROPERTIES HEADER_FILE_ONLY TRUE)
 set_source_files_properties("../../../../../modules/juce_audio_processors/processors/juce_AudioProcessorListener.h" PROPERTIES HEADER_FILE_ONLY TRUE)
@@ -2158,12 +2163,15 @@ set_source_files_properties("../../../../../modules/juce_audio_processors/utilit
 set_source_files_properties("../../../../../modules/juce_audio_processors/utilities/juce_AudioProcessorParameterWithID.h" PROPERTIES HEADER_FILE_ONLY TRUE)
 set_source_files_properties("../../../../../modules/juce_audio_processors/utilities/juce_AudioProcessorValueTreeState.cpp" PROPERTIES HEADER_FILE_ONLY TRUE)
 set_source_files_properties("../../../../../modules/juce_audio_processors/utilities/juce_AudioProcessorValueTreeState.h" PROPERTIES HEADER_FILE_ONLY TRUE)
+set_source_files_properties("../../../../../modules/juce_audio_processors/utilities/juce_ExtensionsVisitor.h" PROPERTIES HEADER_FILE_ONLY TRUE)
 set_source_files_properties("../../../../../modules/juce_audio_processors/utilities/juce_ParameterAttachments.cpp" PROPERTIES HEADER_FILE_ONLY TRUE)
 set_source_files_properties("../../../../../modules/juce_audio_processors/utilities/juce_ParameterAttachments.h" PROPERTIES HEADER_FILE_ONLY TRUE)
 set_source_files_properties("../../../../../modules/juce_audio_processors/utilities/juce_PluginHostType.cpp" PROPERTIES HEADER_FILE_ONLY TRUE)
 set_source_files_properties("../../../../../modules/juce_audio_processors/utilities/juce_PluginHostType.h" PROPERTIES HEADER_FILE_ONLY TRUE)
 set_source_files_properties("../../../../../modules/juce_audio_processors/utilities/juce_RangedAudioParameter.cpp" PROPERTIES HEADER_FILE_ONLY TRUE)
 set_source_files_properties("../../../../../modules/juce_audio_processors/utilities/juce_RangedAudioParameter.h" PROPERTIES HEADER_FILE_ONLY TRUE)
+set_source_files_properties("../../../../../modules/juce_audio_processors/utilities/juce_VST3ClientExtensions.h" PROPERTIES HEADER_FILE_ONLY TRUE)
+set_source_files_properties("../../../../../modules/juce_audio_processors/utilities/juce_VSTCallbackHandler.h" PROPERTIES HEADER_FILE_ONLY TRUE)
 set_source_files_properties("../../../../../modules/juce_audio_processors/juce_audio_processors.cpp" PROPERTIES HEADER_FILE_ONLY TRUE)
 set_source_files_properties("../../../../../modules/juce_audio_processors/juce_audio_processors.mm" PROPERTIES HEADER_FILE_ONLY TRUE)
 set_source_files_properties("../../../../../modules/juce_audio_processors/juce_audio_processors.h" PROPERTIES HEADER_FILE_ONLY TRUE)
diff --git a/extras/NetworkGraphicsDemo/Builds/VisualStudio2019/NetworkGraphicsDemo_App.vcxproj b/extras/NetworkGraphicsDemo/Builds/VisualStudio2019/NetworkGraphicsDemo_App.vcxproj
index 15f6f58ca7..0a0be664ff 100644
--- a/extras/NetworkGraphicsDemo/Builds/VisualStudio2019/NetworkGraphicsDemo_App.vcxproj
+++ b/extras/NetworkGraphicsDemo/Builds/VisualStudio2019/NetworkGraphicsDemo_App.vcxproj
@@ -2464,6 +2464,7 @@
     <ClInclude Include="..\..\..\..\modules\juce_audio_processors\processors\juce_AudioPluginInstance.h"/>
     <ClInclude Include="..\..\..\..\modules\juce_audio_processors\processors\juce_AudioProcessor.h"/>
     <ClInclude Include="..\..\..\..\modules\juce_audio_processors\processors\juce_AudioProcessorEditor.h"/>
+    <ClInclude Include="..\..\..\..\modules\juce_audio_processors\processors\juce_AudioProcessorEditorHostContext.h"/>
     <ClInclude Include="..\..\..\..\modules\juce_audio_processors\processors\juce_AudioProcessorGraph.h"/>
     <ClInclude Include="..\..\..\..\modules\juce_audio_processors\processors\juce_AudioProcessorListener.h"/>
     <ClInclude Include="..\..\..\..\modules\juce_audio_processors\processors\juce_AudioProcessorParameter.h"/>
@@ -2479,9 +2480,12 @@
     <ClInclude Include="..\..\..\..\modules\juce_audio_processors\utilities\juce_AudioParameterInt.h"/>
     <ClInclude Include="..\..\..\..\modules\juce_audio_processors\utilities\juce_AudioProcessorParameterWithID.h"/>
     <ClInclude Include="..\..\..\..\modules\juce_audio_processors\utilities\juce_AudioProcessorValueTreeState.h"/>
+    <ClInclude Include="..\..\..\..\modules\juce_audio_processors\utilities\juce_ExtensionsVisitor.h"/>
     <ClInclude Include="..\..\..\..\modules\juce_audio_processors\utilities\juce_ParameterAttachments.h"/>
     <ClInclude Include="..\..\..\..\modules\juce_audio_processors\utilities\juce_PluginHostType.h"/>
     <ClInclude Include="..\..\..\..\modules\juce_audio_processors\utilities\juce_RangedAudioParameter.h"/>
+    <ClInclude Include="..\..\..\..\modules\juce_audio_processors\utilities\juce_VST3ClientExtensions.h"/>
+    <ClInclude Include="..\..\..\..\modules\juce_audio_processors\utilities\juce_VSTCallbackHandler.h"/>
     <ClInclude Include="..\..\..\..\modules\juce_audio_processors\juce_audio_processors.h"/>
     <ClInclude Include="..\..\..\..\modules\juce_audio_utils\audio_cd\juce_AudioCDBurner.h"/>
     <ClInclude Include="..\..\..\..\modules\juce_audio_utils\audio_cd\juce_AudioCDReader.h"/>
diff --git a/extras/NetworkGraphicsDemo/Builds/VisualStudio2019/NetworkGraphicsDemo_App.vcxproj.filters b/extras/NetworkGraphicsDemo/Builds/VisualStudio2019/NetworkGraphicsDemo_App.vcxproj.filters
index 136200128b..696973e8ff 100644
--- a/extras/NetworkGraphicsDemo/Builds/VisualStudio2019/NetworkGraphicsDemo_App.vcxproj.filters
+++ b/extras/NetworkGraphicsDemo/Builds/VisualStudio2019/NetworkGraphicsDemo_App.vcxproj.filters
@@ -3570,6 +3570,9 @@
     <ClInclude Include="..\..\..\..\modules\juce_audio_processors\processors\juce_AudioProcessorEditor.h">
       <Filter>JUCE Modules\juce_audio_processors\processors</Filter>
     </ClInclude>
+    <ClInclude Include="..\..\..\..\modules\juce_audio_processors\processors\juce_AudioProcessorEditorHostContext.h">
+      <Filter>JUCE Modules\juce_audio_processors\processors</Filter>
+    </ClInclude>
     <ClInclude Include="..\..\..\..\modules\juce_audio_processors\processors\juce_AudioProcessorGraph.h">
       <Filter>JUCE Modules\juce_audio_processors\processors</Filter>
     </ClInclude>
@@ -3615,6 +3618,9 @@
     <ClInclude Include="..\..\..\..\modules\juce_audio_processors\utilities\juce_AudioProcessorValueTreeState.h">
       <Filter>JUCE Modules\juce_audio_processors\utilities</Filter>
     </ClInclude>
+    <ClInclude Include="..\..\..\..\modules\juce_audio_processors\utilities\juce_ExtensionsVisitor.h">
+      <Filter>JUCE Modules\juce_audio_processors\utilities</Filter>
+    </ClInclude>
     <ClInclude Include="..\..\..\..\modules\juce_audio_processors\utilities\juce_ParameterAttachments.h">
       <Filter>JUCE Modules\juce_audio_processors\utilities</Filter>
     </ClInclude>
@@ -3624,6 +3630,12 @@
     <ClInclude Include="..\..\..\..\modules\juce_audio_processors\utilities\juce_RangedAudioParameter.h">
       <Filter>JUCE Modules\juce_audio_processors\utilities</Filter>
     </ClInclude>
+    <ClInclude Include="..\..\..\..\modules\juce_audio_processors\utilities\juce_VST3ClientExtensions.h">
+      <Filter>JUCE Modules\juce_audio_processors\utilities</Filter>
+    </ClInclude>
+    <ClInclude Include="..\..\..\..\modules\juce_audio_processors\utilities\juce_VSTCallbackHandler.h">
+      <Filter>JUCE Modules\juce_audio_processors\utilities</Filter>
+    </ClInclude>
     <ClInclude Include="..\..\..\..\modules\juce_audio_processors\juce_audio_processors.h">
       <Filter>JUCE Modules\juce_audio_processors</Filter>
     </ClInclude>
diff --git a/extras/UnitTestRunner/Builds/VisualStudio2017/UnitTestRunner_ConsoleApp.vcxproj b/extras/UnitTestRunner/Builds/VisualStudio2017/UnitTestRunner_ConsoleApp.vcxproj
index 4dc7db37a2..181cede87e 100644
--- a/extras/UnitTestRunner/Builds/VisualStudio2017/UnitTestRunner_ConsoleApp.vcxproj
+++ b/extras/UnitTestRunner/Builds/VisualStudio2017/UnitTestRunner_ConsoleApp.vcxproj
@@ -2622,6 +2622,7 @@
     <ClInclude Include="..\..\..\..\modules\juce_audio_processors\processors\juce_AudioPluginInstance.h"/>
     <ClInclude Include="..\..\..\..\modules\juce_audio_processors\processors\juce_AudioProcessor.h"/>
     <ClInclude Include="..\..\..\..\modules\juce_audio_processors\processors\juce_AudioProcessorEditor.h"/>
+    <ClInclude Include="..\..\..\..\modules\juce_audio_processors\processors\juce_AudioProcessorEditorHostContext.h"/>
     <ClInclude Include="..\..\..\..\modules\juce_audio_processors\processors\juce_AudioProcessorGraph.h"/>
     <ClInclude Include="..\..\..\..\modules\juce_audio_processors\processors\juce_AudioProcessorListener.h"/>
     <ClInclude Include="..\..\..\..\modules\juce_audio_processors\processors\juce_AudioProcessorParameter.h"/>
@@ -2637,9 +2638,12 @@
     <ClInclude Include="..\..\..\..\modules\juce_audio_processors\utilities\juce_AudioParameterInt.h"/>
     <ClInclude Include="..\..\..\..\modules\juce_audio_processors\utilities\juce_AudioProcessorParameterWithID.h"/>
     <ClInclude Include="..\..\..\..\modules\juce_audio_processors\utilities\juce_AudioProcessorValueTreeState.h"/>
+    <ClInclude Include="..\..\..\..\modules\juce_audio_processors\utilities\juce_ExtensionsVisitor.h"/>
     <ClInclude Include="..\..\..\..\modules\juce_audio_processors\utilities\juce_ParameterAttachments.h"/>
     <ClInclude Include="..\..\..\..\modules\juce_audio_processors\utilities\juce_PluginHostType.h"/>
     <ClInclude Include="..\..\..\..\modules\juce_audio_processors\utilities\juce_RangedAudioParameter.h"/>
+    <ClInclude Include="..\..\..\..\modules\juce_audio_processors\utilities\juce_VST3ClientExtensions.h"/>
+    <ClInclude Include="..\..\..\..\modules\juce_audio_processors\utilities\juce_VSTCallbackHandler.h"/>
     <ClInclude Include="..\..\..\..\modules\juce_audio_processors\juce_audio_processors.h"/>
     <ClInclude Include="..\..\..\..\modules\juce_audio_utils\audio_cd\juce_AudioCDBurner.h"/>
     <ClInclude Include="..\..\..\..\modules\juce_audio_utils\audio_cd\juce_AudioCDReader.h"/>
diff --git a/extras/UnitTestRunner/Builds/VisualStudio2017/UnitTestRunner_ConsoleApp.vcxproj.filters b/extras/UnitTestRunner/Builds/VisualStudio2017/UnitTestRunner_ConsoleApp.vcxproj.filters
index 30303de623..b5988cbc95 100644
--- a/extras/UnitTestRunner/Builds/VisualStudio2017/UnitTestRunner_ConsoleApp.vcxproj.filters
+++ b/extras/UnitTestRunner/Builds/VisualStudio2017/UnitTestRunner_ConsoleApp.vcxproj.filters
@@ -3798,6 +3798,9 @@
     <ClInclude Include="..\..\..\..\modules\juce_audio_processors\processors\juce_AudioProcessorEditor.h">
       <Filter>JUCE Modules\juce_audio_processors\processors</Filter>
     </ClInclude>
+    <ClInclude Include="..\..\..\..\modules\juce_audio_processors\processors\juce_AudioProcessorEditorHostContext.h">
+      <Filter>JUCE Modules\juce_audio_processors\processors</Filter>
+    </ClInclude>
     <ClInclude Include="..\..\..\..\modules\juce_audio_processors\processors\juce_AudioProcessorGraph.h">
       <Filter>JUCE Modules\juce_audio_processors\processors</Filter>
     </ClInclude>
@@ -3843,6 +3846,9 @@
     <ClInclude Include="..\..\..\..\modules\juce_audio_processors\utilities\juce_AudioProcessorValueTreeState.h">
       <Filter>JUCE Modules\juce_audio_processors\utilities</Filter>
     </ClInclude>
+    <ClInclude Include="..\..\..\..\modules\juce_audio_processors\utilities\juce_ExtensionsVisitor.h">
+      <Filter>JUCE Modules\juce_audio_processors\utilities</Filter>
+    </ClInclude>
     <ClInclude Include="..\..\..\..\modules\juce_audio_processors\utilities\juce_ParameterAttachments.h">
       <Filter>JUCE Modules\juce_audio_processors\utilities</Filter>
     </ClInclude>
@@ -3852,6 +3858,12 @@
     <ClInclude Include="..\..\..\..\modules\juce_audio_processors\utilities\juce_RangedAudioParameter.h">
       <Filter>JUCE Modules\juce_audio_processors\utilities</Filter>
     </ClInclude>
+    <ClInclude Include="..\..\..\..\modules\juce_audio_processors\utilities\juce_VST3ClientExtensions.h">
+      <Filter>JUCE Modules\juce_audio_processors\utilities</Filter>
+    </ClInclude>
+    <ClInclude Include="..\..\..\..\modules\juce_audio_processors\utilities\juce_VSTCallbackHandler.h">
+      <Filter>JUCE Modules\juce_audio_processors\utilities</Filter>
+    </ClInclude>
     <ClInclude Include="..\..\..\..\modules\juce_audio_processors\juce_audio_processors.h">
       <Filter>JUCE Modules\juce_audio_processors</Filter>
     </ClInclude>
diff --git a/extras/UnitTestRunner/Builds/VisualStudio2019/UnitTestRunner_ConsoleApp.vcxproj b/extras/UnitTestRunner/Builds/VisualStudio2019/UnitTestRunner_ConsoleApp.vcxproj
index 721ccb10c0..49d396a25a 100644
--- a/extras/UnitTestRunner/Builds/VisualStudio2019/UnitTestRunner_ConsoleApp.vcxproj
+++ b/extras/UnitTestRunner/Builds/VisualStudio2019/UnitTestRunner_ConsoleApp.vcxproj
@@ -2622,6 +2622,7 @@
     <ClInclude Include="..\..\..\..\modules\juce_audio_processors\processors\juce_AudioPluginInstance.h"/>
     <ClInclude Include="..\..\..\..\modules\juce_audio_processors\processors\juce_AudioProcessor.h"/>
     <ClInclude Include="..\..\..\..\modules\juce_audio_processors\processors\juce_AudioProcessorEditor.h"/>
+    <ClInclude Include="..\..\..\..\modules\juce_audio_processors\processors\juce_AudioProcessorEditorHostContext.h"/>
     <ClInclude Include="..\..\..\..\modules\juce_audio_processors\processors\juce_AudioProcessorGraph.h"/>
     <ClInclude Include="..\..\..\..\modules\juce_audio_processors\processors\juce_AudioProcessorListener.h"/>
     <ClInclude Include="..\..\..\..\modules\juce_audio_processors\processors\juce_AudioProcessorParameter.h"/>
@@ -2637,9 +2638,12 @@
     <ClInclude Include="..\..\..\..\modules\juce_audio_processors\utilities\juce_AudioParameterInt.h"/>
     <ClInclude Include="..\..\..\..\modules\juce_audio_processors\utilities\juce_AudioProcessorParameterWithID.h"/>
     <ClInclude Include="..\..\..\..\modules\juce_audio_processors\utilities\juce_AudioProcessorValueTreeState.h"/>
+    <ClInclude Include="..\..\..\..\modules\juce_audio_processors\utilities\juce_ExtensionsVisitor.h"/>
     <ClInclude Include="..\..\..\..\modules\juce_audio_processors\utilities\juce_ParameterAttachments.h"/>
     <ClInclude Include="..\..\..\..\modules\juce_audio_processors\utilities\juce_PluginHostType.h"/>
     <ClInclude Include="..\..\..\..\modules\juce_audio_processors\utilities\juce_RangedAudioParameter.h"/>
+    <ClInclude Include="..\..\..\..\modules\juce_audio_processors\utilities\juce_VST3ClientExtensions.h"/>
+    <ClInclude Include="..\..\..\..\modules\juce_audio_processors\utilities\juce_VSTCallbackHandler.h"/>
     <ClInclude Include="..\..\..\..\modules\juce_audio_processors\juce_audio_processors.h"/>
     <ClInclude Include="..\..\..\..\modules\juce_audio_utils\audio_cd\juce_AudioCDBurner.h"/>
     <ClInclude Include="..\..\..\..\modules\juce_audio_utils\audio_cd\juce_AudioCDReader.h"/>
diff --git a/extras/UnitTestRunner/Builds/VisualStudio2019/UnitTestRunner_ConsoleApp.vcxproj.filters b/extras/UnitTestRunner/Builds/VisualStudio2019/UnitTestRunner_ConsoleApp.vcxproj.filters
index 14b55cae8a..9f7598af5a 100644
--- a/extras/UnitTestRunner/Builds/VisualStudio2019/UnitTestRunner_ConsoleApp.vcxproj.filters
+++ b/extras/UnitTestRunner/Builds/VisualStudio2019/UnitTestRunner_ConsoleApp.vcxproj.filters
@@ -3798,6 +3798,9 @@
     <ClInclude Include="..\..\..\..\modules\juce_audio_processors\processors\juce_AudioProcessorEditor.h">
       <Filter>JUCE Modules\juce_audio_processors\processors</Filter>
     </ClInclude>
+    <ClInclude Include="..\..\..\..\modules\juce_audio_processors\processors\juce_AudioProcessorEditorHostContext.h">
+      <Filter>JUCE Modules\juce_audio_processors\processors</Filter>
+    </ClInclude>
     <ClInclude Include="..\..\..\..\modules\juce_audio_processors\processors\juce_AudioProcessorGraph.h">
       <Filter>JUCE Modules\juce_audio_processors\processors</Filter>
     </ClInclude>
@@ -3843,6 +3846,9 @@
     <ClInclude Include="..\..\..\..\modules\juce_audio_processors\utilities\juce_AudioProcessorValueTreeState.h">
       <Filter>JUCE Modules\juce_audio_processors\utilities</Filter>
     </ClInclude>
+    <ClInclude Include="..\..\..\..\modules\juce_audio_processors\utilities\juce_ExtensionsVisitor.h">
+      <Filter>JUCE Modules\juce_audio_processors\utilities</Filter>
+    </ClInclude>
     <ClInclude Include="..\..\..\..\modules\juce_audio_processors\utilities\juce_ParameterAttachments.h">
       <Filter>JUCE Modules\juce_audio_processors\utilities</Filter>
     </ClInclude>
@@ -3852,6 +3858,12 @@
     <ClInclude Include="..\..\..\..\modules\juce_audio_processors\utilities\juce_RangedAudioParameter.h">
       <Filter>JUCE Modules\juce_audio_processors\utilities</Filter>
     </ClInclude>
+    <ClInclude Include="..\..\..\..\modules\juce_audio_processors\utilities\juce_VST3ClientExtensions.h">
+      <Filter>JUCE Modules\juce_audio_processors\utilities</Filter>
+    </ClInclude>
+    <ClInclude Include="..\..\..\..\modules\juce_audio_processors\utilities\juce_VSTCallbackHandler.h">
+      <Filter>JUCE Modules\juce_audio_processors\utilities</Filter>
+    </ClInclude>
     <ClInclude Include="..\..\..\..\modules\juce_audio_processors\juce_audio_processors.h">
       <Filter>JUCE Modules\juce_audio_processors</Filter>
     </ClInclude>
diff --git a/extras/WindowsDLL/Builds/VisualStudio2019/WindowsDLL_StaticLibrary.vcxproj b/extras/WindowsDLL/Builds/VisualStudio2019/WindowsDLL_StaticLibrary.vcxproj
index 61bb455a80..7510bcbf35 100644
--- a/extras/WindowsDLL/Builds/VisualStudio2019/WindowsDLL_StaticLibrary.vcxproj
+++ b/extras/WindowsDLL/Builds/VisualStudio2019/WindowsDLL_StaticLibrary.vcxproj
@@ -2440,6 +2440,7 @@
     <ClInclude Include="..\..\..\..\modules\juce_audio_processors\processors\juce_AudioPluginInstance.h"/>
     <ClInclude Include="..\..\..\..\modules\juce_audio_processors\processors\juce_AudioProcessor.h"/>
     <ClInclude Include="..\..\..\..\modules\juce_audio_processors\processors\juce_AudioProcessorEditor.h"/>
+    <ClInclude Include="..\..\..\..\modules\juce_audio_processors\processors\juce_AudioProcessorEditorHostContext.h"/>
     <ClInclude Include="..\..\..\..\modules\juce_audio_processors\processors\juce_AudioProcessorGraph.h"/>
     <ClInclude Include="..\..\..\..\modules\juce_audio_processors\processors\juce_AudioProcessorListener.h"/>
     <ClInclude Include="..\..\..\..\modules\juce_audio_processors\processors\juce_AudioProcessorParameter.h"/>
@@ -2455,9 +2456,12 @@
     <ClInclude Include="..\..\..\..\modules\juce_audio_processors\utilities\juce_AudioParameterInt.h"/>
     <ClInclude Include="..\..\..\..\modules\juce_audio_processors\utilities\juce_AudioProcessorParameterWithID.h"/>
     <ClInclude Include="..\..\..\..\modules\juce_audio_processors\utilities\juce_AudioProcessorValueTreeState.h"/>
+    <ClInclude Include="..\..\..\..\modules\juce_audio_processors\utilities\juce_ExtensionsVisitor.h"/>
     <ClInclude Include="..\..\..\..\modules\juce_audio_processors\utilities\juce_ParameterAttachments.h"/>
     <ClInclude Include="..\..\..\..\modules\juce_audio_processors\utilities\juce_PluginHostType.h"/>
     <ClInclude Include="..\..\..\..\modules\juce_audio_processors\utilities\juce_RangedAudioParameter.h"/>
+    <ClInclude Include="..\..\..\..\modules\juce_audio_processors\utilities\juce_VST3ClientExtensions.h"/>
+    <ClInclude Include="..\..\..\..\modules\juce_audio_processors\utilities\juce_VSTCallbackHandler.h"/>
     <ClInclude Include="..\..\..\..\modules\juce_audio_processors\juce_audio_processors.h"/>
     <ClInclude Include="..\..\..\..\modules\juce_audio_utils\audio_cd\juce_AudioCDBurner.h"/>
     <ClInclude Include="..\..\..\..\modules\juce_audio_utils\audio_cd\juce_AudioCDReader.h"/>
diff --git a/extras/WindowsDLL/Builds/VisualStudio2019/WindowsDLL_StaticLibrary.vcxproj.filters b/extras/WindowsDLL/Builds/VisualStudio2019/WindowsDLL_StaticLibrary.vcxproj.filters
index b62975af0e..2811ca9e52 100644
--- a/extras/WindowsDLL/Builds/VisualStudio2019/WindowsDLL_StaticLibrary.vcxproj.filters
+++ b/extras/WindowsDLL/Builds/VisualStudio2019/WindowsDLL_StaticLibrary.vcxproj.filters
@@ -3537,6 +3537,9 @@
     <ClInclude Include="..\..\..\..\modules\juce_audio_processors\processors\juce_AudioProcessorEditor.h">
       <Filter>JUCE Modules\juce_audio_processors\processors</Filter>
     </ClInclude>
+    <ClInclude Include="..\..\..\..\modules\juce_audio_processors\processors\juce_AudioProcessorEditorHostContext.h">
+      <Filter>JUCE Modules\juce_audio_processors\processors</Filter>
+    </ClInclude>
     <ClInclude Include="..\..\..\..\modules\juce_audio_processors\processors\juce_AudioProcessorGraph.h">
       <Filter>JUCE Modules\juce_audio_processors\processors</Filter>
     </ClInclude>
@@ -3582,6 +3585,9 @@
     <ClInclude Include="..\..\..\..\modules\juce_audio_processors\utilities\juce_AudioProcessorValueTreeState.h">
       <Filter>JUCE Modules\juce_audio_processors\utilities</Filter>
     </ClInclude>
+    <ClInclude Include="..\..\..\..\modules\juce_audio_processors\utilities\juce_ExtensionsVisitor.h">
+      <Filter>JUCE Modules\juce_audio_processors\utilities</Filter>
+    </ClInclude>
     <ClInclude Include="..\..\..\..\modules\juce_audio_processors\utilities\juce_ParameterAttachments.h">
       <Filter>JUCE Modules\juce_audio_processors\utilities</Filter>
     </ClInclude>
@@ -3591,6 +3597,12 @@
     <ClInclude Include="..\..\..\..\modules\juce_audio_processors\utilities\juce_RangedAudioParameter.h">
       <Filter>JUCE Modules\juce_audio_processors\utilities</Filter>
     </ClInclude>
+    <ClInclude Include="..\..\..\..\modules\juce_audio_processors\utilities\juce_VST3ClientExtensions.h">
+      <Filter>JUCE Modules\juce_audio_processors\utilities</Filter>
+    </ClInclude>
+    <ClInclude Include="..\..\..\..\modules\juce_audio_processors\utilities\juce_VSTCallbackHandler.h">
+      <Filter>JUCE Modules\juce_audio_processors\utilities</Filter>
+    </ClInclude>
     <ClInclude Include="..\..\..\..\modules\juce_audio_processors\juce_audio_processors.h">
       <Filter>JUCE Modules\juce_audio_processors</Filter>
     </ClInclude>