IWMRegisteredDevice::Open method (wmsdkidl.h)
[The feature associated with this page, Windows Media Format 11 SDK, is a legacy feature. It has been superseded by Source Reader and Sink Writer. Source Reader and Sink Writer have been optimized for Windows 10 and Windows 11. Microsoft strongly recommends that new code use Source Reader and Sink Writer instead of Windows Media Format 11 SDK, when possible. Microsoft suggests that existing code that uses the legacy APIs be rewritten to use the new APIs if possible.]
The Open method opens the device so that it can receive media data.
Syntax
HRESULT Open();
Return value
The method returns an HRESULT. Possible values include, but are not limited to, those in the following table.
| Return code | Description |
|---|---|
|
The method succeeded. |
|
The client computer already has the maximum number of devices opened. |
Remarks
To receive data, a device must be opened, validated, and approved.
Use this method to open the device. To determine whether the device is already open, call IsOpened. Only 10 devices can be open on a computer at a time.
The device is valid only if proximity detection has been performed on it within the past 48 hours. You can check the validity of the device by calling IsValid. For more information, see the IWMProximityDetection interface.
Call the IsApproved method to determine whether the device is approved. To approve the device, call the Approve method.
Requirements
| Minimum supported client | Windows XP [desktop apps only],Windows Media Format 9.5 SDK |
| Minimum supported server | Windows Server 2003 [desktop apps only] |
| Target Platform | Windows |
| Header | wmsdkidl.h (include Wmsdk.h) |
| Library | WMStubDRM.lib |