IVMRMonitorConfig9::GetDefaultMonitor method (vmr9.h)

Article
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 It has been superseded by MediaPlayer, IMFMediaEngine, and Audio/Video Capture in Media Foundation.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 GetDefaultMonitor method retrieves the default monitor that all future instances of the VMR will use for video playback.

Syntax

HRESULT GetDefaultMonitor(
  [out] UINT *puDev
);

Parameters

[out] puDev

Pointer that receives an index that identifies the default monitor on the system.

Return value

The method returns an HRESULT. Possible values include the following.

Return code	Description
E_POINTER	NULL pointer argument.
S_OK	The method succeeded.
VFW_E_WRONG_STATE	The allocator-presenter has not been loaded.

Remarks

Use this method on a multi-monitor system to determine which is the default Direct3D device the overlay mixer filter will use when connecting to an upstream filter.

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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