_SID

Metadatacopy
struct _SID {
    unsigned char Revision;/* 0x0  1 */
    unsigned char SubAuthorityCount;/* 0x1  1 */
    struct _SID_IDENTIFIER_AUTHORITY IdentifierAuthority;/* 0x2  6 */
    unsigned long SubAuthority[1];/* 0x8  4 */
};
/* source: Windows 2000 RC2 DDK Alpha libcntpr.lib CodeView type records; build 2128 per the DDK's ntverp.h */