IVMRWindowlessControl9::RepaintVideo method (vmr9.h)

發行項
4/26/2023

[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 It has been superseded by MediaPlayer, IMFMediaEngine, and Audio/Video Capture in Media Foundation.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 RepaintVideo method repaints the current video frame.

Syntax

HRESULT RepaintVideo(
  [in] HWND hwnd,
  [in] HDC  hdc
);

Parameters

[in] hwnd

Specifies the handle of the window in which the repainting should occur.

[in] hdc

Specifies the handle to the device context for the window.

Return value

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

Return code	Description
S_OK	The method succeeded.
VFW_E_WRONG_STATE	The VMR is not in windowless mode.

Remarks

Include DShow.h and D3d9.h before Vmr9.h.

Requirements

Requirement	Value
Minimum supported client	Windows XP with SP2 [desktop apps only]
Minimum supported server	Windows Server 2003 R2 [desktop apps only]
Target Platform	Windows
Header	vmr9.h
Library	Strmiids.lib

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