void CtestDlg::OnBnClickedButton1()
{
	CoInitialize(NULL);
	IGraphBuilder *pGraph;
	CoCreateInstance(CLSID_FilterGraph, NULL, 
    CLSCTX_INPROC_SERVER, IID_IGraphBuilder, (void **)&pGraph);
	IMediaControl *pControl;
	IMediaEvent   *pEvent;
	IVideoWindow *pVidWin = NULL;
	pGraph->QueryInterface(IID_IVideoWindow, (void **)&pVidWin);
	pGraph->QueryInterface(IID_IMediaControl, (void **)&pControl);
	pGraph->QueryInterface(IID_IMediaEvent, (void **)&pEvent);

	const char* WndClass=AfxRegisterWndClass(CS_HREDRAW|CS_VREDRAW);	//Fensterklasse für MovieWindow registrieren.
	CWnd *p=new CWnd;
	p->CreateEx(NULL,WndClass,"CAMEDI",WS_POPUP|WS_TABSTOP|WS_CAPTION|WS_SYSMENU|WS_VISIBLE|WS_MINIMIZEBOX,250,50,700,450,NULL,NULL);	//MovieWindow erstellen (anzeigen).

	pVidWin->put_Owner((OAHWND)p->m_hWnd);
	pVidWin->put_WindowStyle(WS_CHILD | WS_CLIPSIBLINGS);
	RECT grc;
	::GetClientRect(p->m_hWnd, &grc);
	pVidWin->SetWindowPosition(0, 0, grc.right, grc.bottom);
	pGraph->RenderFile(L"C:\\test.avi", NULL);
	pControl->Run();
	long evCode = 0;
	pEvent->WaitForCompletion(INFINITE, &evCode);
	pControl->Release();
	pEvent->Release();
	pGraph->Release();
	CoUninitialize();
}

Mein Problem ist, das m_hWnd der Handle auf den Dialog ist. Das Video wird aber nicht wirklich im Dialog angezeigt. Was mache ich falsch??

danke!!!
grüße