I'm currently using a listbox with this statement:
If(IsNull(Date([ITEM_EXPIRING_DATE],'DD/MM/YYYY')),'Only active items')
With it he listbox shows me only one checkbox and if I select it I get only the not expired items. I would like to have two checkboxes, one of them selected by default (the extension that I use provides this) that shows me only the active items and the other one that shows me all the values if I select it. Now I'm only able to select active items or not active items, but I'd like to have only active items or all the objects (active and not active).