The filter graph manager exposes the IMediaEventSink interface; it is called from filters to notify events. Applications use the IMediaEvent interface on the filter graph manager to retrieve these events.
When to Implement
There is no need to implement this method because it is implemented by the filter graph manager.
When to Use
Filters use this interface to post event notifications.
Methods in Vtable Order
| IUnknown methods | Description |
| QueryInterface | Returns pointers to supported interfaces. |
| AddRef | Increments the reference count. |
| Release | Decrements the reference count. |
| IMediaEventSink methods | Description |
| Notify | Notifies an event. |
Notifies an event.
HRESULT Notify(
long EventCode,
long EventParam1,
long EventParam2
);
Returns an HRESULT value.
The event is queued but not delivered to the application on this thread. For a list of notification codes and event parameter values, see Event Notification Codes.
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