KEY - a device I/O statement that assigns soft-key string values to
      function keys and then can be used to display the soft-key values
      in various ways
Syntax                     Use
  KEY LIST                 Displays soft-key string values
  KEY {ON|OFF}             Turns on and off the soft-key display line at the
                           bottom of the screen
  KEY n,stringexpression   Assigns soft-key string values
 
    - n is the number of a specific key, chosen from the values below:
      1-10   Function keys F1-F10            | 14     DOWN
        11   UP                              | 15-25  User-defined keys
        12   LEFT                            | 30-31  Function keys F11-F12
        13   RIGHT                           |        on 101-key keyboards
 
    - stringexpression, for all values of n except 15 through 25, is the
      is the string that is input by the program when the key is pressed.
      For n = 15 through 25, stringexpression has the syntax
        CHR$(keyboardflag) + CHR$(scancode)
 
See Also  <ON KEY(N)>  <KEYBOARD SCAN CODE TABLE>
Other Uses of the KEY Keyword
  <KEY(N)> - to trap a full range of keypress events