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IAMWstDecoder::SetDrawBackgroundMode method (iwstdec.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 It has been superseded by MediaPlayer, IMFMediaEngine, and Audio/Video Capture in Media Foundation.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.]

Downstream filters use the SetDrawBackgroundMode method to assign whether the caption text background is to be opaque or transparent.

Syntax

HRESULT SetDrawBackgroundMode(
  [in] AM_WST_DRAWBGMODE Mode
);

Parameters

[in] Mode

A member of the AM_WST_DRAWBGMODE enumeration that specifies whether the caption text background is to be opaque or transparent.

Value Description
AM_WST_DRAWBGMODE_Opaque Caption text background is opaque.
AM_WST_DRAWBGMODE_Transparent Caption text background is transparent.

Return value

When the method succeeds, it returns S_OK. Otherwise, it returns an HRESULT error code.

Requirements

Requirement Value
Minimum supported client Windows XP [desktop apps only]
Minimum supported server Windows Server 2003 [desktop apps only]
Target Platform Windows
Header iwstdec.h
Library Strmiids.lib

See also

Error and Success Codes

IAMWstDecoder Interface