|Microsoft DirectX 9.0|
The AddFilterToCache method adds a filter to the filter cache.
HRESULT AddFilterToCache( IBaseFilter *pFilter );
[in] Pointer to the IBaseFilter interface of the filter.
Returns one of the following HRESULT values.
|E_POINTER||Null pointer argument.|
|S_FALSE||Filter is already in the cache.|
|S_OK||Filter was added to the cache.|
You must disconnect all of the filter's pins before calling this method, or the method will fail. If the filter is in the filter graph, this method will remove it. This method will also put the filter into a stopped state, if it is not already.