Self.Backpack.Use(UseID)???

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OMG, you want to put that item into hotkeys? JUST DO IT IN TIBIA CLIENT....
Unless u play some old version where u had no items on hotkeys.

or at least explain arleady what the hell you need it for, when do u need it, what it is supose to do and how you want it to be done.....
Cuz from what u said so far, i cant understand s**t .
then nobody can help you