inventory questions

I have an inventory right now but I can only add items to it at the moment and was wondering how I would make the icons moveable to any slot and useable like items. Any refrences or links to help out ?

Here is a drag and drop GUI tut :

http://eej.dk/angryant/general/tipsandtricks/gui-drag-drop/

I think that would get you started for now

Жop4

There’s actually a tutorial about this over at BurgZergArcade.com:

videos 124-127