void GetCaptureTVTunerSignalPresent(IltmmCapture *pCapture)
{
IltmmTVTuner* pTuner;
// get the tuner object
HRESULT hr = pCapture->get_TVTuner(&pTuner);
if(SUCCEEDED(hr) && pTuner != NULL)
{
long lSignalPresent;
// check if signal present
pTuner->get_SignalPresent(&lSignalPresent);
// release the tuner object
pTuner->Release();
}
}