IWMDeviceRegistration::GetFirstRegisteredDevice 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 It has been superseded by Source Reader and Sink Writer.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.]
[GetFirstRegisteredDevice is available for use in the operating systems specified in the Requirements section. It may be altered or unavailable in subsequent versions. Instead, use Microsoft PlayReady. ]
The GetFirstRegisteredDevice method retrieves information about the first device of a specified type that is in the device registration database.
Syntax
HRESULT GetFirstRegisteredDevice(
[in] DWORD dwRegisterType,
[out] IWMRegisteredDevice **ppDevice
);
Parameters
[in] dwRegisterType
The type of device for which to retrieve information. Devices that support Windows Media DRM 10 for Network Devices use the DRM_DEVICE_REGISTER_TYPE_STREAMING register type.
[out] ppDevice
Address of a variable that receives a pointer to an IWMRegisteredDevice interface. This interface provides access to information about the first registered device in the database that matches the type specified by dwRegisterType.
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 ppDevice parameter is NULL. |
|
There are no registered devices to enumerate. When this value is returned, the address pointed to by ppDevice is set to NULL. |
Remarks
To enumerate registered devices of a given type, begin by calling this method to retrieve the first device entry. Then make repeated calls to GetNextRegisteredDevice to get subsequent device entries from the database.
The DRM_DEVICE_REGISTER_TYPE_STORAGE register type is defined, but is not used in this release.
Requirements
Requirement | Value |
---|---|
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 |