Function Keys

The most general definition of a function key is any key you do not find on a typewriter keyboard. This definition includes explicit function keys on the keyboard (usually labeled F1, F2 ... F12) and such keys as Esc, the cursor keys, Tab, and Backspace. Enter is also treated as a function key, but with special considerations.

These function keys are divided into two groups:

• Adis function keys. These are used by Adis during the execution of an ACCEPT statement. This includes the cursor keys, Tab, Backspace, Del and Enter.

  Normally, these keys operate as defined during an ACCEPT operation. For example, the left key moves the cursor to the left, Backspace erases the previous character, and so on. With the exception of the Enter key, they do not normally terminate the ACCEPT operation. However, you can make these keys terminate the ACCEPT operation if required.

• User function keys. These are so called because you can decide what they are used for when you are writing an application. There is no predefined action assigned to these keys. The user function keys generally include the keys labeled F1,F2 ...F12, the Escape key, and any other special keys that are on the keyboard.