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Thanks for your response.. I do realise that they are the message map macros - that was badly worded.

I have now resolved the issue though - you need to call SetOwner after calling Create, unlike...

I have an application which creates a CMFCToolBar from a toolbar resource in another application and docks it to its own window, thus:

// load the module containing the resource
HINSTANCE...

Can anyone suggest how I can draw OpenGL shapes over the top of an existing window?

I can pass the existing window in to my OpenGL code and it will draw on it but the background (ie. the original...