| Microsoft DirectX 9.0 |
The SetDefaultMonitor method specifies the default monitor that all future instances of the VMR should use for video playback.
Syntax
HRESULT SetDefaultMonitor(
const VMRGUID* pGUID
);
Parameters
pGUID
[in] Pointer to a VMRGUID structure that identifies the monitor.
Return Values
Returns an HRESULT value. Possible values include the following.
| Error Code | Description |
| E_FAIL | Could not set the specified monitor as the default. |
| E_INVALIDARG | Invalid argument. The specified monitor does not exist, or the pGUID parameter was not formatted correctly. |
| E_POINTER | NULL pointer argument. |
| S_OK | Success. |
| VFW_E_WRONG_STATE | The allocator-presenter has not been loaded. |
Remarks
Use this method on a multi-monitor system to specify to the VMR the default DirectDraw device to use when connecting to an upstream filter. The default DirectDraw device can be overriden for a particular connection by the SetMonitor method.
The pGUID member of the VMRGUID structure must be either NULL, indicating the default DirectDraw device, or equal to the address of the GUID member of the VMRGUID structure. Otherwise, the method returns E_INVALIDARG.
If the specified GUID does not correspond to any monitor, the method return E_INVALIDARG.
See Also