void GetCaptureTVTunerAudioSubChannel(IltmmCapture *pCapture)
{
IltmmTVTuner* pTuner;
// try to get the capture tv tuner interface
HRESULT hr = pCapture->get_TVTuner(&pTuner);
if (SUCCEEDED(hr) && pTuner != NULL)
{
long lAudioSubChangle;
pTuner->get_AudioSubChannel(&lAudioSubChangle);
// release the tuner object
pTuner->Release();
}
}