When you run a CL program that performs a Copy File (CPYF) or Open Query File (OPNQRYF) command, you usually see a status message like "Copying member or label..." or "Query running..." at the bottom of the screen. Sometimes, you do not want the user to see these messages or you want to show your own message. The trick is easily done by placing the following command into your CL program:

CHGJOB STSMSG(*NONE)