Raised by a media source when it starts a new stream.
When the IMFMediaSource::Start method is called on a media source, the media source sends one event for each selected stream:
The source sends the MENewStream event if the stream was not selected in the previous call to Start, or this is the very first call to Start on this media source.
No events are sent for unselected streams.
Possible values retrieved from IMFMediaEvent::GetValue include the following.
||Contains a pointer to the stream's IMFMediaStream interface.
|Minimum supported client
||Windows Vista [desktop apps only]
|Minimum supported server
||Windows Server 2008 [desktop apps only]