IVMRMonitorConfig::GetAvailableMonitors method (strmif.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 It has been superseded by MediaPlayer, IMFMediaEngine, and Audio/Video Capture in Media Foundation.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 GetAvailableMonitors method retrieves information about the monitors currently available on the system.
Syntax
HRESULT GetAvailableMonitors(
[out] VMRMONITORINFO *pInfo,
[in] DWORD dwMaxInfoArraySize,
[out] DWORD *pdwNumDevices
);
Parameters
[out] pInfo
Pointer to an array of VMRMONITORINFO structures that contain information about each monitor on the system.
[in] dwMaxInfoArraySize
Specifies the maximum number of members in the array.
[out] pdwNumDevices
Pointer to a variable that receives the number of devices retrieved.
Return value
Returns an HRESULT value. Possible values include the following.
| Return code | Description |
|---|---|
|
Invalid argument; dwMaxInfoArraySize must be greater than zero. |
|
NULL pointer argument. |
|
Success. |
Remarks
Use this method to get a list of DirectDraw device GUIDs and their associated monitor information that the VMR can use when connecting to an upstream decoder filter. To return the required array size in the pdwNumDevices parameter, specify NULL for pInfo.
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 |