CBaseControlWindow.get_MessageDrain method
[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 It has been superseded by MediaPlayer, IMFMediaEngine, and Audio/Video Capture in Media Foundation.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 get_MessageDrain method retrieves the current message drain.
Syntax
HRESULT get_MessageDrain(
OAHWND *Drain
);
Parameters
-
Drain
-
Pointer to the current window receiving window messages.
Return value
Returns an HRESULT value.
Remarks
Messages sent to the video renderer filter can be posted to another window. The window registered to receive these messages (using the CBaseControlWindow::get_MessageDrain member function) is the current message drain.
Requirements
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