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 It has been superseded by Source Reader and Sink Writer.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.

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

See also

IWMDeviceRegistration Interface