The
setoperatorid function sets the operator ID to the string expression
operator_id for the current data entry session. The operator ID is generally entered by the operator or
passed as a parameter in the PFF file, but for some programs, such as menu systems, it may be useful to set the operator ID in logic.
The function returns 1 (true) if successful or 0 (false) if the function failed or was executed in batch mode.