>thank you Fred,
>another and last question: the command to know the position of Item in Listbox.
>Es: if i need to addItem
> Thisform.list1.additem.value="Pippo"
> if i need to removeItem
> Thisform.list1.removeItem(number of position)
>how can do to know this number?

ListBox.ListIndex could be used. This has the index of the item that is the crrently selected one.