IWMDeviceRegistration::GetRegistrationStats method (wmsdkidl.h)

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4/26/2023

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 It has been superseded by Source Reader and Sink Writer.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

[GetRegistrationStats 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 GetRegistrationStats method retrieves the number of devices in the device registration database that have a specified type.

Syntax

HRESULT GetRegistrationStats(
  [in]  DWORD dwRegisterType,
  [out] DWORD *pcRegisteredDevices
);

Parameters

[in] dwRegisterType

The type of the device for which to retrieve the count. Devices that support Windows Media DRM 10 for Network Devices use the DRM_DEVICE_REGISTER_TYPE_STREAMING register type.

[out] pcRegisteredDevices

Address of a variable that receives the number of registered devices of the specified type.

Return value

The method returns an HRESULT. Possible values include, but are not limited to, those in the following table.

Return code	Description
S_OK	The method succeeded.
E_INVALIDARG	The pcRegisteredDevices parameter is NULL.

Remarks

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

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