The following method for C++ shows how to use the ltmmPlayCtrl object to play the DVR buffer data file format (.LBL file).
HRESULT PlayDVRBufferFile(IltmmPlayCtrl *pPlay)
{
// Set the source file on the player
HRESULT hr = pPlay->put_SourceFile(TEXT("C:\\Temp\\DVR\\Capture.LBL"));
return hr;
}