<oListBox>:delItem(<nPosition>) --> self

        <nPosition>is a numeric value that indicates the position in the
        list of the item to delete.

        delItem() is a method of the ListBox class that is used for removing
        an item from a list.  ListBox:buffer is automatically adjusted when
        an item is deleted while the last item in the list is selected.

        Note:  When present, the scroll bar is automatically updated to
        reflect the deletion of the item.