>I have a list box with mover buttons:
>
>myList.MoverBars = .T.
>
>How do I trap the reordering of objects in the list (I click on a list item and drag it to a different position in the list ) and differentiate that event from simply clicking on one of the list items (without repositioning it)?

The difference is that when you just click on an item in a listbox InteractiveChange event fires (I am setting aside other events like When, GotFocus, MouseDown, MouseUp).
so the events sequence you are interested in basically is

InteractiveChange()
Click()

When you reorder the items with moverbars, the sequence is

ProgrammaticChange()
InteractiveChange()
Click()

So, you might set some property in ProgrammaticChange(), check it in InteractiveChange() and reset in Click().

That might give you some control. Of course you should watch if any other code somewhere may change the listbox value programmatically.