Change ABAP Program return code

Dear ABAP Gurus,

I need to change internal return(message) code inside APAP program (report).

Program starts as the first program in a scheduled job with several programs in, and we want to have the following programs do not start in some cases which are evaluated in the first program. Normally program ends will internal return (message) code 0000. I need to change this return code.

Thank you very much,

Svetlana