Checkbox with all values option

[#1]

Hi everybody,

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).

What do you suggest?

Thanks a lot for your help and for your attention

Best regards

Nicolò Cogno