IMixerOCX::SetDrawRegion 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 It has been superseded by MediaPlayer, IMFMediaEngine, and Audio/Video Capture in Media Foundation.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 SetDrawRegion method specifies the location and dimensions of the video and clipping rectangles in screen coordinates.

Syntax

HRESULT SetDrawRegion(
  [in] LPPOINT lpptTopLeftSC,
  [in] LPCRECT prcDrawCC,
  [in] LPCRECT lprcClip
);

Parameters

[in] lpptTopLeftSC

Specifies the top left of the video rectangle in screen coordinates. (The Overlay Mixer filter ignores this parameter. This parameter should be set to NULL.)

[in] prcDrawCC

Specifies the video rectangle in screen coordinates. This parameter cannot be NULL.

[in] lprcClip

Specifies the clipping rectangle in screen coordinates. This parameter cannot be NULL.

Return value

The method returns an HRESULT value. Possible values include those in the following table.

Return code	Description
S_OK	The method succeeded.
E_INVALIDARG	Either prcDrawCC or lprcClip are NULL.

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