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IWMRegisteredDevice::GetAttributeCount 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 It has been superseded by Source Reader and Sink Writer.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 GetAttributeCount method retrieves the total number of attributes associated with the device.

Syntax

HRESULT GetAttributeCount(
  [out] DWORD *pcAttributes
);

Parameters

[out] pcAttributes

Address of a variable that receives the number of attributes.

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.

Remarks

To enumerate the device attributes, first call this method and then call GetAttributeByIndex for index values from zero through one less than the total number of attributes.

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

See also

IWMRegisteredDevice Interface