By default, the numeric keypad "+" key (KEY_PLUS) moves the next choice into the field; the numeric keypad "-" key (KEY_MINUS) moves the previous choice into the field. If the mouse is enabled (PCDOS only), the user can click on the spin button controls to initiate the same actions. By default, the field is PROTECTED so that the user cannot type directly into the field. The value that is displayed in the field when the user leaves the field is the value that is selected.
You can change the "+" and "-" key assignments by modifying the field event table FLDETP. If the spin button is to be used in a scrollable region, you must also modify the scrollable region event table SRETP. See Chapters 37 and 39, "How Event Processing Works" and "Installing Event Functions and Modifying Event Tables," for more information.
