Programming Guide

This chapter describes control functions supplied with Panther. You can use these functions in control strings and in JPL call statements. Unlike other control hook functions, these functions are installed internally and cannot be deinstalled.

• jm_exit—ends processing and leaves the current screen

• jm_gotop—returns to form stack's base screen

• jm_goform—invokes a dialog box that prompts for the name of a screen to display

• jm_keys—simulates keyboard input

• jm_system—prompts for and executes an operating system command

• jm_winsize—lets users manipulate a screen's viewport from the keyboard

  Notes: Built-in control functions are internally installed. Unlike Panther library functions, they can only be called from within Panther.