关于netmeeting Com组件应用的系统开发
我现在在做视频传输这块，现在碰到这么个问题。如何把传入的视频显示在自己所新建的窗口上，看过一些自带sample，Avpone3工程中好像也没有实现，找相关视频显示的代码只有这些，希望众位多多指教，非常急因为马上要被检查。

C/C++ code

HWND CreateNetMeetingWindow(HWND hWndParent, int x, int y, LPCTSTR szMode){    USES_CONVERSION;            TCHAR szFormatModeString[MAX_PATH];    wsprintf(szFormatModeString, _T("MODE=%s"), szMode);    NmInitStruct nmis;    nmis.wSize = sizeof(nmis.str);    wcscpy(nmis.str, T2OLE(szFormatModeString));    LPOLESTR strGUIDNetMeetingActiveXControl = NULL;    StringFromCLSID(CLSID_NetMeeting, &strGUIDNetMeetingActiveXControl);      HWND hWndCtl =         ::CreateWindow("AtlAxWin",            // Use ATL's string conversion routine to convert to a LPTSTR from an LPOLESTR         OLE2T(strGUIDNetMeetingActiveXControl),         WS_CHILD | WS_VISIBLE | WS_GROUP,          x,          y,          0,          0,          hWndParent,          NULL,         ::GetModuleHandle(NULL),          &nmis         );            // Remember to free memory given to you by StringFromCLSID    CoTaskMemFree(strGUIDNetMeetingActiveXControl );    if(hWndCtl)    {            // get the IUnknown for the video window (we want to get it's size)        IUnknown* pUnk = NULL;        HRESULT hr = AtlAxGetControl(hWndCtl, &pUnk);        if(SUCCEEDED(hr))        {                // Now get the IOleObject interface for the netmeeting control            IOleObject* pOleObjVideoWindow = NULL;            hr = pUnk->QueryInterface(&pOleObjVideoWindow);            if(SUCCEEDED(hr))            {                    // get the Extent                SIZEL sizel = {0, 0};                hr = pOleObjVideoWindow->GetExtent(DVASPECT_CONTENT, &sizel);                if(SUCCEEDED(hr))                {                        // Convert the Extent from HIMETRIC to pixels.                    SIZEL sizeInPixels = {0, 0};                    AtlHiMetricToPixel(&sizel, &sizeInPixels);                    SetWindowPos(hWndCtl, NULL, 0, 0, sizeInPixels.cx, sizeInPixels.cy, SWP_NOMOVE | SWP_NOZORDER | SWP_NOACTIVATE);                }                    // Don't forget to release interfaces!                pOleObjVideoWindow->Release();            }                // Don't forget to release interfaces!            pUnk->Release();        }    }    return hWndCtl;}

就是这个没看懂，感觉也没什么用，获得的channel也跟这个无关啊。

[解决办法]
帖子都沉底了！只能帮楼顶到上面，以期更多高手帮楼主解决难题！