<oListBox>:setItem(<nPosition>, <aItem>) --> self

        <nPosition> is a numeric value that indicates the position of the
        item within the list which is being replaced.

        <aItem> is the new list box item expressed as a two-element array
        consisting of the item's text and data respectively.

        setItem() is a method of the ListBox class that is used for replacing
        an item in a list.