Outbound FMH

On output, the FMH can be built by the application program or by CICS.

If your program supplies the FMH, you place it at the front of your output data and specify the FMH option on your SEND command. If CICS is to build the FMH, you reserve the first three bytes of the message for CICS to complete and omit the FMH option. CICS builds an FMH only for devices that require one; you must supply it for devices for which it is optional.