GetUserInfo
GetUserInfo(UserId AS Integer, Name AS String[, FirstName AS String[, sCode As String[, nLangId As Integer]]]) AS Integer
Returns the name of the user designated by the numeric identifier <UserId> in <Name>, his first name in <FirstName>, his code in <Code> and his language in <nLangId>.
Returns an error code (0 if no error, 8 if invalid user ID).