IFullScreenVideoEx::SetMessageDrain method (amvideo.h)
[The feature associated with this page, DirectShow, is a legacy feature. It has been superseded by MediaPlayer, IMFMediaEngine, and Audio/Video Capture in Media Foundation. Those features have been optimized for Windows 10 and Windows 11. Microsoft strongly recommends that new code use MediaPlayer, IMFMediaEngine and Audio/Video Capture in Media Foundation instead of DirectShow, when possible. Microsoft suggests that existing code that uses the legacy APIs be rewritten to use the new APIs if possible.]
The SetMessageDrain method specifies a window to receive mouse and keyboard messages from the video window.
Syntax
HRESULT SetMessageDrain(
[in] HWND hwnd
);
Parameters
[in] hwnd
Specifies a handle to the message-drain window.
Return value
Returns an HRESULT value.
Remarks
This method is equivalent to the IVideoWindow::put_MessageDrain method.
The Full Screen video renderer posts all mouse and keyboard messages to the window designated as a message drain. The exact list of messages that are posted is the same as the list given in put_MessageDrain.
Applications do not need to use this method. Instead, call the Filter Graph Manager's put_MessageDrain method before switching to full-screen mode. The Filter Graph Manager automatically sets the same message drain on the renderer that it selects for full-screen mode.
Requirements
| Requirement | Value |
|---|---|
| Minimum supported client | Windows 2000 Professional [desktop apps only] |
| Minimum supported server | Windows 2000 Server [desktop apps only] |
| Target Platform | Windows |
| Header | amvideo.h (include Dshow.h) |
| Library | Strmiids.lib |