Application-defined commands

Form requests are implemented as integers above the low-level ETI (curses) maximum key value KEY_MAX. A symbolic constant MAX_COMMAND is provided so applications can implement their own commands without conflicting with the ETI form or menu subsystems. All ETI system form requests are greater than KEY_MAX and less than or equal to MAX_COMMAND. You should set your application-defined commands to an integer greater than MAX_COMMAND.