Handling messages for window from other process

Posted by MK on Stack Overflow See other posts from Stack Overflow or by MK
Published on 2009-09-01T19:13:30Z Indexed on 2010/04/01 17:03 UTC
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c#

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reparenting

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Windows

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messages

I'm developing a C# WPF application that reparents the main window of another application using a call to Win32 SetParent(). The handle to this out-of-process child window is wrapped by a class named FormHost which is derived from HwndHost. All is working well except for one thing: messages for the reparented window are not delivered to FormHost. MSDN documentation clearly states that the HwndHost window procedure WndProc() cannot be used with out-of-process windows. The alternative, MessageHook doesn't work either. I also tried calling AttachThreadInput() to combine the input processing of the two windows. No luck. Any suggestions?

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