PropertyListBox.NewRow
From Jeremie Leroy - XOJO Controls Wiki
Method
PropertyListBox.NewRow ( Name As String, Caption As String = "", isChild As Boolean = False )
Because the Listbox uses its own storage system, to add a new row to the Listbox, use this method instead of Addrow. Caption and isChild are optional parameters. If Caption is an empty String, the Name is used as Caption.