H_CHANGEPASSWORD(Allow user to change password
H_CONTROLACCESS()Security access control routine
H_DECODE() Decode an encoded string
H_ENABLELOGON() Allow users to logon to an application
H_ENCODE() Encode a string
H_INHIBITLOGON() Inhibit logons by setting a semaphore
H_LOGFAIL() Get a user out of a system if they fail to log on
H_LOGOFF() Log a user off a system
H_LOGON1() Log a user on to a system
H_WHOISLOGGEDON()Report on users logged on to the system