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

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

void EnableMyVideoProcessor() 
{ 
   IltmmProcessors *pVideoProcessors = NULL; 
   IltmmPlay_get_VideoProcessors(pPlayCtrl, &pVideoProcessors); 
   if(NULL != pVideoProcessors) 
   { 
      // Register the external filter by class id 
      IltmmProcessors_RegisterExternalProcessor(pVideoProcessors, L"{AFF289A6-ABF1-4d68-9A51-634BF7077CFC}", VARIANT_TRUE); 
      IUnknown_Release(pVideoProcessors); 
   } 
}

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