IWMDRMWriter::GenerateKeyID 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 It has been superseded by Source Reader and Sink Writer.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.]

[GenerateKeyID 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 GenerateKeyID method generates a DRM key ID.

Syntax

HRESULT GenerateKeyID(
  [out]     WCHAR *pwszKeyID,
  [in, out] DWORD *pcwchLength
);

Parameters

[out] pwszKeyID

Pointer to a wide-character null-terminated string containing the key identifier. Set to NULL to retrieve the size of the string, which is returned in pcwchLength.

[in, out] pcwchLength

Pointer to a DWORD containing the size, in wide characters, of pwszKeyID. This size includes the terminating null character.

Return value

If the method succeeds, it returns S_OK. If it fails, it returns an HRESULT error code.

Remarks

Each file should have its own key ID.

Requirements

See also

IWMDRMWriter Interface