OT - Help with Tasking Window

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I think it's possible, but it won't be easy, it would require either using manual macro with
Misc.ClickEx(X, Y) which is basically left click mouse (here is example of use)

Or Sending arrow Keys and Enter with Tibia.SendKey(VirtualKeyCode)

You would have lent me some account on this OTS logged out already near NPC, so I could do macro for you quick way,
or slower way, by using the remote desktop app on your computer.