void GetPlayerSourceVideoType(IltmmPlay *pPlay) { BSTR bstrSourceVideoType; CString strSourceVideoType; // try to get the source video type GUID string HRESULT hr = pPlay->get_SourceVideoType(&bstrSourceVideoType); // if we were successful display the guid if (SUCCEEDED(hr)) { strSourceVideoType = "Source Video Type GUID is "; strSourceVideoType += bstrSourceVideoType; MessageBox(NULL, strSourceVideoType, TEXT("Source Video Type"), MB_OK); SysFreeString(bstrSourceVideoType); } else { MessageBox(NULL, TEXT("Unable to get the source video type GUID"), TEXT("Source Video Type"), MB_OK); } }