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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 It has been superseded by MediaPlayer, IMFMediaEngine, and Audio/Video Capture in Media Foundation.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

Requirement Value
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

See also

IMixerOCX Interface

Overlay Mixer