Apple AppleShare 3.0 Users and Groups Programming Interface - Manual (Page 24)

Data File, the state of the reserved bits should be preserved.
The following figure shows the ugSrvrFlags bits.
All of the ugSrvrFlags flags are effective as soon as the file server is
started, except for IACGlobalEnabled, which is effective only after the
computer is restarted.
Parameter blocks needed to call the Users and Groups library functions
In Pascal:
{ Use UGFilePB for UGOpenFile, UGCloseFile and UGCreateFile }
UGFilePB = RECORD
qLink: QElemPtr;
qType: INTEGER;
ugTrap: INTEGER;
ugCmdAddr: Ptr;
ugCompletion: ProcPtr;
ugResult: OSErr;
ugNamePtr: StringPtr;
ugVRefNum: INTEGER;
ugRefNum: INTEGER;
ugDirID: LONGINT;
ugAccessID: LONGINT;
ugUserID: LONGINT;
ugGroupID: LONGINT;
ugAdminKey: StringPtr;
END;
{ Use UGUserPB for UGNewUser, UGDeleteUser, UGRenameUser, }
{ UGGetUserInfo, UGSetUserInfo, and UGAuthenticateUser }
UGUserPB = RECORD
qLink: QElemPtr;
qType: INTEGER;
ugTrap: INTEGER;