CTRA Style menu interface
 

This is a big thing im trying to do here and I really not so sure where to start.

Im hoping to create something like the CTRaid Tab from CTRA.

It will list all players in a raid and allow them to be dragged and dropped into slots in different orders.

So I kind of invision two windows.

One: Similar to the CTRaid window, with various empty slots waiting to be filled.
Two: a list of all raid members, each one able to be draged and dropped into one of the slots in window one.

These arrangements would not have to affect raid groups or anything else. I simply want to be able to drag and drop raid members into slots. Thats all i need for right now.

Is there anywhere I can find an example of this?
Or somewhere where I can find a turtorial that will help me understand how this works.

Thanks