See OnMoveItem Event. In the previous versions you could use ProgrammaticChange event.

>I have a listbox with its MoverBars set to show. I have a "Save" button that is disabled until the user changes anything on the form. My problem is, I want the "Save" button to enable when the user changes the order of the items in the listbox. What listbox event can I trap for this?
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>I tried the interactivechange() event. Although it fires when an item is moved the problem is that it fires simply by clicking on an item in the list without moving it. In effect nothing changed so I don't want to enable the "Save" button.