TIMER Statements Details
 
Syntax
  TIMER ON
  TIMER OFF
  TIMER STOP
 
TIMER ON enables timer event trapping by an ON TIMER statement. While
trapping is enabled, a check is made after every statement to see if
the specified time has elapsed. If it has, the ON TIMER event-handling
routine is executed.
 
TIMER OFF disables timer event trapping. If an event takes place, it
is not remembered if a subsequent TIMER ON is executed.
 
TIMER STOP disables the timer event trapping. However, if an event
occurs, it is remembered and the ON TIMER event-handling routine is
executed as soon as trapping is reenabled with TIMER ON.