Draw custom element between listbox items

Question

I want to draw custom elements (like an empty square> between the items of a listbox, to indicate that users can insert/drop items from another listbox between other items.

How can I do this? I have some rather hacky solution for this, but I hope there is an easier way to do this.
One of the ideas is to use different DataTemplates for items for odd and even indexes in the listbox.

Answer 1

There is a very elegant solution to this that can be seen here.

(if the link ever goes out of date, as it has once already, a google search on "bea stollnitz drag drop listbox" will probably get you to the right page, if it exists.)