IOverlayNotify2 interface (strmif.h)

The IOverlayNotify2 interface derives from the IOverlayNotify interface. IOverlayNotify2 gives asynchronous notifications of changes to the rendering window, identifying changes to the exposed window area. The advise link optionally supports this for the purpose of accepting IOverlayNotify2::OnDisplayChange notification.

To get notifications that the exposed window area has changed, decoders that do their own drawing should implement an IOverlayNotify2 interface.

The video renderer is the only filter that calls the method on this interface. This is done automatically by the default video renderer.


The IOverlayNotify2 interface inherits from IOverlayNotify. IOverlayNotify2 also has these types of members:


The IOverlayNotify2 interface has these methods.


The OnDisplayChange method provides notification that the exposed window area has changed.


Minimum supported client Windows 2000 Professional [desktop apps only]
Minimum supported server Windows 2000 Server [desktop apps only]
Target Platform Windows
Header strmif.h (include Dshow.h)

See also