PillarSoft
http://www.pillarsoft.net/help/os2/showtime-2/select-allnone.shtml
ShowTime/2 - Select all/none
SELECT ALL
Selects (highlights) all items in the listbox.
SELECT NONE
Unselects (unhighlights) all selected items in the listbox.
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Cycle order
ShowTime/2
Add to/Delete from list
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