IltmmCapture::get_UseVideoDeviceAudio Example for C++

HRESULT UseCaptureVideoDeviceAudio(IltmmCapture *pCapture) 
{ 
   HRESULT   hr; 
   VARIANT_BOOL   vEnable; 
 
   // try to video device audio enabled state 
   pCapture->get_UseVideoDeviceAudio(&vEnable); 
   if (FAILED(hr)) 
      return hr; 
 
   // if we are not using video device audio 
   if (vEnable == VARIANT_FALSE) 
   { 
      // try to enable it 
      pCapture->put_UseVideoDeviceAudio(VARIANT_TRUE); 
      if (FAILED(hr)) 
         return hr; 
   } 
 
   return S_OK; 
} 
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