Most of the Foreground processing logic resides in the option panels and associated CLISTs to make modifications as easy as possible. Before modifying existing options or adding new ones, you should study one or more of the distributed panel/CLIST pairs to understand the relationships that exist among the panel, the CLIST, and the program ISRFPR. In particular, be aware of these items:

• Additional variables such as LANG and ZORG are used to pass information to log messages, error messages, and panels.
• These commands cannot be invoked under the Foreground option: SPF, PDF, ISPF, ISPSTART, LOGON, LOGOFF, TEST, or a CALL to an authorized program.
• If the CLIST returns a nonzero return code in the EXIT statement, ISRFPR does not attempt to process any second CLIST that was specified by ZSEL2.