| Microsoft DirectX 9.0 |
The display mode has changed.
Parameters
lParam1
Pointer to the IPin interface of the video renderer's input pin, or zero.
lParam2
Zero.
Default Action
The filter graph manager temporarily stops the graph, and then disconnects and reconnects the video renderer. It does not pass the event to the application.
Remarks
Video renderers can send this event in response to a WM_DISPLAYCHANGE message. The WM_DISPLAYCHANGE message indicates that the user has changed the display resolution.
During pin connection, most video renderers pick a format based on the current display mode. If the display mode changes, the video renderer might need to choose another format. By sending this message, the renderer signals to the filter graph manager that it needs to be reconnected. During the reconnection, the renderer can select a new format. If the reconnection fails, the filter graph manager sends an EC_ERRORABORT event to the application.
See Also