IltmmTVTuner::get_SignalPresent Example for C

IltmmTVTuner* pTuner; 
HRESULT hr = IltmmCapture__get_TVTuner (m_capture, &pTuner); 
if(SUCCEEDED(hr) && pTuner != NULL) 
{
      long lSignalPresent; 
      IltmmTVTuner__get_SignalPresent(pTuner, &lSignalPresent); 
      IltmmTVTuner_Release(pTuner); 
}