IMixerOCX::OnDraw method (mixerocx.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 It has been superseded by MediaPlayer, IMFMediaEngine, and Audio/Video Capture in Media Foundation.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 OnDraw method instructs the Overlay Mixer to draw the video rectangle.
Syntax
HRESULT OnDraw(
[in] HDC hdcDraw,
[in] LPCRECT prcDraw
);
Parameters
[in] hdcDraw
Specifies the device context associated with the parent window.
[in] prcDraw
Specifies the rectangle coordinates of the video rectangle.
Return value
If the method succeeds, it returns S_OK.
Remarks
The HDC provided here should not be cached.
Requirements
| Minimum supported client | Windows 2000 Professional [desktop apps only] |
| Minimum supported server | Windows 2000 Server [desktop apps only] |
| Target Platform | Windows |
| Header | mixerocx.h |
| Library | Strmiids.lib |