AddItem id:Int, text:Str
Add an item to the list box. The item will be added at the end. The text is displayed on the listbox. The id will be used to select an item and report the user selection.
If the text contains a single tab character ("\t", Chr(9)), the list will use a two-column layout.
Since: PCC 1.1.1, PCC2 1.99.25
See also: Listbox(), Listbox Commands
