IltmmCaptureSubTypes::get_Count Example for C++

void GetNearestCaptureInputSelection(IltmmCapture *pCapture)
{
   IltmmCaptureSubTypes* pVideoCapSubTypes;
   IltmmCaptureSubType*  pCapSubType;
   long lCount, lSel, i;
   VARIANT_BOOL bVar;
   BSTR bstrName = NULL, bstrFriendlyName = NULL;

   pCapture->get_VideoCaptureSubTypes(&pVideoCapSubTypes);
   pVideoCapSubTypes->get_Count(&lCount);
   if (lCount > 0)
   {
      for (i = 0; i < lCount; i++)
      {
         pVideoCapSubTypes->Item(i, &pCapSubType);

         // get the desired subtype
         // we'll just take the first one for this example
         if (i == 1)
         {
            pCapSubType->get_Name(&bstrName);
            pCapSubType->get_FriendlyName(&bstrFriendlyName);
            pCapSubType->get_Selected(&bVar);

            // unselect it for demonstration purposes
            if (bVar == VARIANT_TRUE)
               pCapSubType->put_Selected(VARIANT_FALSE);
         }

         // release the capture subtype object
         pCapSubType->Release();
      }

      // get the current selection (should be -1 or not 1)
      pVideoCapSubTypes->get_Selection(&lSel);

      // this should be true
      if (lSel != 1 && NULL != bstrName)
      {
         pVideoCapSubTypes->Find(bstrName, &lSel);
         pVideoCapSubTypes->put_Selection(lSel);
      }

      // free the bstrs
      SysFreeString(bstrName);
      SysFreeString(bstrFriendlyName);
   }

   // release the capture subtypes object
   pVideoCapSubTypes->Release();
}