Sets the login ID in the SQL Server login record.
SqlSetLUser% ( loginrec%, loginid$ )
where
SUCCEED (1) or FAIL (0).
SQL Server uses the loginrec% parameter you set with SqlSetLUser% to determine who is attempting a connection. For SqlSetLUser% to have any effect, it must be called before SqlOpen%. You must provide a login ID to establish a SQL Server connection. The SQL Server login IDs are defined in the syslogins table in the master database.
SqlLogin%, SqlOpen%, SqlSetLApp%, SqlSetLHost%, SqlSetLPwd%