void GetPlaySourceAudioFormat(IltmmPlay *pPlay) { CString strSourceAudioFormat; long lSourceAudioFormat; // get the source audio format FOURCC number HRESULT hr = pPlay->get_SourceAudioFormat(&lSourceAudioFormat); if (SUCCEEDED(hr)) { if (lSourceAudioFormat == 0) strSourceAudioFormat = TEXT("Source audio format is not a standard format"); else strSourceAudioFormat.Format(TEXT("Source audio format is %d"), lSourceAudioFormat); // display the source audio format MessageBox(NULL, strSourceAudioFormat, TEXT("Source Audio FOURCC Format"), MB_OK); } }