fix macOS build (following Projucer changes made in Windows, which removed /Applications/JUCE/modules from its headers). move JUCE headers under source control, so that Windows and macOS can both build against same version of JUCE. remove AUv3 target (I think it's an iOS thing, so it will never work with this macOS fluidsynth dylib).

modules/juce_gui_extra/embedding/juce_ActiveXControlComponent.h

@@ -0,0 +1,130 @@
+/*
+  ==============================================================================
+
+   This file is part of the JUCE library.
+   Copyright (c) 2017 - ROLI Ltd.
+
+   JUCE is an open source library subject to commercial or open-source
+   licensing.
+
+   By using JUCE, you agree to the terms of both the JUCE 5 End-User License
+   Agreement and JUCE 5 Privacy Policy (both updated and effective as of the
+   27th April 2017).
+
+   End User License Agreement: www.juce.com/juce-5-licence
+   Privacy Policy: www.juce.com/juce-5-privacy-policy
+
+   Or: You may also use this code under the terms of the GPL v3 (see
+   www.gnu.org/licenses).
+
+   JUCE IS PROVIDED "AS IS" WITHOUT ANY WARRANTY, AND ALL WARRANTIES, WHETHER
+   EXPRESSED OR IMPLIED, INCLUDING MERCHANTABILITY AND FITNESS FOR PURPOSE, ARE
+   DISCLAIMED.
+
+  ==============================================================================
+*/
+
+namespace juce
+{
+
+#if JUCE_WINDOWS || DOXYGEN
+
+//==============================================================================
+/**
+    A Windows-specific class that can create and embed an ActiveX control inside
+    itself.
+
+    To use it, create one of these, put it in place and make sure it's visible in a
+    window, then use createControl() to instantiate an ActiveX control. The control
+    will then be moved and resized to follow the movements of this component.
+
+    Of course, since the control is a heavyweight window, it'll obliterate any
+    JUCE components that may overlap this component, but that's life.
+
+    @tags{GUI}
+*/
+class JUCE_API  ActiveXControlComponent   : public Component
+{
+public:
+    //==============================================================================
+    /** Create an initially-empty container. */
+    ActiveXControlComponent();
+
+    /** Destructor. */
+    ~ActiveXControlComponent();
+
+    /** Tries to create an ActiveX control and embed it in this peer.
+
+        The peer controlIID is a pointer to an IID structure - it's treated
+        as a void* because when including the JUCE headers, you might not always
+        have included windows.h first, in which case IID wouldn't be defined.
+
+        e.g. @code
+        const IID myIID = __uuidof (QTControl);
+        myControlComp->createControl (&myIID);
+        @endcode
+    */
+    bool createControl (const void* controlIID);
+
+    /** Deletes the ActiveX control, if one has been created.
+    */
+    void deleteControl();
+
+    /** Returns true if a control is currently in use. */
+    bool isControlOpen() const noexcept                 { return control != nullptr; }
+
+    /** Does a QueryInterface call on the embedded control object.
+
+        This allows you to cast the control to whatever type of COM object you need.
+
+        The iid parameter is a pointer to an IID structure - it's treated
+        as a void* because when including the JUCE headers, you might not always
+        have included windows.h first, in which case IID wouldn't be defined, but
+        you should just pass a pointer to an IID.
+
+        e.g. @code
+        const IID iid = __uuidof (IOleWindow);
+
+        IOleWindow* oleWindow = (IOleWindow*) myControlComp->queryInterface (&iid);
+
+        if (oleWindow != nullptr)
+        {
+            HWND hwnd;
+            oleWindow->GetWindow (&hwnd);
+
+            ...
+
+            oleWindow->Release();
+        }
+        @endcode
+    */
+    void* queryInterface (const void* iid) const;
+
+    /** Set this to false to stop mouse events being allowed through to the control.
+    */
+    void setMouseEventsAllowed (bool eventsCanReachControl);
+
+    /** Returns true if mouse events are allowed to get through to the control.
+    */
+    bool areMouseEventsAllowed() const noexcept                 { return mouseEventsAllowed; }
+
+    //==============================================================================
+    /** @internal */
+    void paint (Graphics&) override;
+
+    /** @internal */
+    intptr_t offerEventToActiveXControl (void*);
+    static intptr_t offerEventToActiveXControlStatic (void*);
+
+private:
+    class Pimpl;
+    friend struct ContainerDeletePolicy<Pimpl>;
+    std::unique_ptr<Pimpl> control;
+    bool mouseEventsAllowed = true;
+
+    JUCE_DECLARE_NON_COPYABLE_WITH_LEAK_DETECTOR (ActiveXControlComponent)
+};
+
+#endif
+
+} // namespace juce