IltmmConvert::GetSubObjectDispatch Example for C++
// This function checks if the Lens effect filter is available
// and turns off the effect area (cropping feature)
void TurnOffLensCropping(IltmmConvert *pConvert)
{
HRESULT hr;
IDispatch *pDisp = NULL;
ILMVLens *pLens = NULL;
// call the Capture object to retrieve the FilterGraph
hr = pConvert->GetSubObjectDispatch (ltmmConvert_Object_SelVideoProcessor, &pDisp);
if(SUCCEEDED(hr))
{
hr = pDisp->QueryInterface(IID_ILMVLens, (void**)&pLens);
if(SUCCEEDED(hr))
{
pLens->put_EffectAreaEnabled(VARIANT_FALSE);
pLens->Release();
}
pDisp->Release();
}
}