I want to create a loop which loops a code until for example f2 is pressed. So I tried something with _IsPressed but it doesn't work. Local $test = WinActivate("Notepad") Do Send("hi") Until _IsPressed("72", $test)   I don't know how I can do nothing when pressing f2 because it says "error: _IsPressed(): undefined function.". I did put  Send("hi") after Local $test = but it gives the same error. Does anyone know how to solve