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 ON Keyword
 
 ■ The ON keyword is used with various event-trapping statements to either:
         • Specify a trap              • Enable a trap
 
 ■ The ON keyword may also be used to enable error handling.
   See: ◄ON ERROR Statement►
 
 ■ The following table summarizes the use of ON event statements:
 
   Specifies a Trap     Type of Event              Enables a Trap
   ════════════════     ══════════════════════     ═════════════════════════
   ◄ON COM►             Communications port        ◄COM ON►
   ◄ON KEY►             Keystroke                  ◄KEY ON►
   ◄ON PEN►             Lightpen                   ◄PEN ON►
   ◄ON PLAY►            Background-music queue     ◄PLAY ON►
   ◄ON STRIG►           Joystick trigger           ◄STRIG ON►
   ◄ON TIMER►           Timer                      ◄TIMER ON►
   ◄ON UEVENT►          User-defined               ◄UEVENT ON►
 
 ■ With the exception of ON KEY and KEY ON, these event statements can be
   used with object-specific events.  See: ◄Object Events Summary►
 
 See: ◄Error/Event Trapping Summary►