I'm making my own moverlist. When I add an item I need to check and see if that item already exists in the right side listbox. Is there a property that identifies each item in a list regardless if you've taken some out, added some more in, etc...

Ex:
"Apple" in list is 1
"Orange" in list is 2
"Pear" in list is 3

Then, if you take out Apple you get:

"Orange in list is 1
"Pear" in list is 2

Know what I mean?¿ A property which is automatically updated if any changes to the list are made.

Thanks!!