IVMRMonitorConfig9::SetDefaultMonitor method (vmr9.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 It has been superseded by MediaPlayer, IMFMediaEngine, and Audio/Video Capture in Media Foundation.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 SetDefaultMonitor method specifies the default monitor that all future instances of the VMR should use for video playback.
Syntax
HRESULT SetDefaultMonitor(
[in] UINT uDev
);
Parameters
[in] uDev
Index that specifies the default monitor.
Return value
The method returns an HRESULT. Possible values include those in the following table.
| Return code | Description |
|---|---|
|
Could not set the specified monitor as the default. |
|
Invalid argument; uDev does not correspond to a valid monitor. |
|
The method succeeded. |
|
The allocator-presenter has not been loaded. |
Remarks
Use this method on a multi-monitor system to specify to the VMR the default Direct3D device to use when connecting to an upstream filter. The default Direct3D device can be overridden for a particular connection by the SetMonitor method.
Include DShow.h and D3d9.h before Vmr9.h.
Requirements
| 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 |