DRM_DRMHeader
[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 It has been superseded by Source Reader and Sink Writer.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.]
DRM_DRMHeader is the base string for the DRMHeader attributes such as DRM_HeaderKeyID.
g_wszWMDRM_DRM_DRMHeader
WMT_TYPE_STRING
This string can be used to construct custom DRMHeader properties. It is not an attribute in itself.