qb45qck.hlp (Table of Contents; Topic list)
PEN Statements QuickSCREEN
  QuickSCREEN      Details      Example      Contents      Index
──────────────────────────────────────────────────────────────────────────────
PEN - an event-trapping statement that enables, disables, or suspends
      lightpen-event trapping
Syntax
  PEN ON
  PEN OFF
  PEN STOP
 
See Also  ON PEN
Other Uses of the PEN Keyword
PEN function - to read the lightpen coordinates