logical_variable = LSWON ( ISWNUM )

	This logical function will return  .TRUE.  if touch panel switch number
	ISWNUM has changed fron the off state to the on state  since  the  last
	time LSWON was called with switch number ISWNUM specified.   .FALSE. is
	returned the first time LSWON is called for a particular switch.  Valid
	switch numbers are from 0 to 31.