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 It has been superseded by Source Reader and Sink Writer.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

[GenerateKeySeed 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 GenerateKeySeed method generates a DRM key seed.

Syntax

HRESULT GenerateKeySeed(
  [out]     WCHAR *pwszKeySeed,
  [in, out] DWORD *pcwchLength
);

Parameters

[out] pwszKeySeed

Pointer to a wide-character null-terminated string containing the key seed. 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 pwszKeySeed. 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

This method is used infrequently because the same key seed should be used for multiple files. You can use the same key seed for every file created by an application, or distributed from the same server, or you can use it for some subset of files.

Requirements

See also

IWMDRMWriter Interface