|Microsoft DirectX 9.0|
The filter graph has changed state.
Member of the FILTER_STATE enumerated type, indicating the new graph state.
No default action. The event is not sent to the application.
Note This event can occur when the graph shuts down. If you override the default action and listen for this event, you must be especially careful not to process events after releasing the Filter Graph Manager. Otherwise, your application might reference an invalid IMediaEvent pointer and crash. For more information, see Responding to Events.