Use ltmmProcessors Object to Register a 3rd-party DirectShow Filter as a Video Processor for C++

The following method for C++ shows how to use the ltmmProcessors object from the ltmmPlayControl object to register a 3rd-party video processor. 

void PlayerEnableCustomVideoProcessor(IltmmPlay *pPlay) 
{ 
   IltmmProcessors *pVideoProcessors = NULL; 
   // try to get the video processors collection object 
   HRESULT hr = pPlay->get_VideoProcessors(&pVideoProcessors); 
   if (SUCCEEDED(hr) && NULL != pVideoProcessors) 
   { 
      // Register the external filter by class id 
      pVideoProcessors->RegisterExternalProcessor(L"{AFF289A6-ABF1-4d68-9A51-634BF7077CFC}", VARIANT_TRUE); 
      pVideoProcessors->Release(); 
   } 
}

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