Output area
The output area is used on command and WRITE requests
. The first two bytes contain the length of the monitor program's
record to write or the Db2 command
to be issued, plus 4 additional bytes. The next two bytes are reserved.
You
can specify any length from 10 to 4096 (X'000A0000' to X'10000000').
The rest of the area is the actual command or record text.
Example: In an assembler program, a START TRACE
command
is formatted in the following way: 
DC X'002A0000' LENGTH INCLUDING LL00 + COMMAND
DC CL37'-STA TRACE(MON) DEST(OPX) BUFSIZE(256)'