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[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 It has been superseded by MediaPlayer, IMFMediaEngine, and Audio/Video Capture in Media Foundation.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] VMRGUID *pGUID
);
Parameters
[out] pGUID
Pointer to a VMRGUID structure that identifies the default monitor on the system.
Return value
Returns an HRESULT value. Possible values include the following.
| Return code | Description |
|---|---|
|
NULL pointer argument. |
|
Success. |
|
The allocator-presenter has not been loaded. |
Remarks
Use this method on a multi-monitor system to determine which is the default DirectDraw device the VMR will use when connecting to an upstream filter.
Requirements
| Requirement | Value |
|---|---|
| Minimum supported client | Windows XP with SP1 [desktop apps only] |
| Minimum supported server | Windows Server 2003 [desktop apps only] |
| Target Platform | Windows |
| Header | strmif.h (include Dshow.h) |
| Library | Strmiids.lib |