IWMDeviceRegistration::UnregisterDevice 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 It has been superseded by Source Reader and Sink Writer.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.]
[UnregisterDevice 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 UnregisterDevice method removes a device from the device registration database.
Syntax
HRESULT UnregisterDevice(
[in] DWORD dwRegisterType,
[in] BYTE *pbCertificate,
[in] DWORD cbCertificate,
[in] DRM_VAL16 SerialNumber
);
Parameters
[in] dwRegisterType
DWORD containing the type of the device to remove. Devices that support Windows Media DRM 10 for Network Devices use the DRM_DEVICE_REGISTER_TYPE_STREAMING register type.
[in] pbCertificate
Address of the device certificate in memory.
[in] cbCertificate
The size of the certificate data in bytes.
[in] SerialNumber
128-bit device identifier, stored in a DRM_VAL16 structure.
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 pbCertificate parameter is NULL, but the cbCertificate parameter is greater than zero. |
Remarks
The DRM_DEVICE_REGISTER_TYPE_STORAGE register type is defined, but is not used in this release.
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 |