AutoHotKey script to treat a long press of the up arrow key as shift. Useful for laptops like the Razer Blade stealth 13 since the up arrow is where shift should be.

UpArrowLongPressAsShift.ahk

#NoEnv  ; Recommended for performance and compatibility with future AutoHotkey releases.
; #Warn  ; Enable warnings to assist with detecting common errors.
SendMode Input  ; Recommended for new scripts due to its superior speed and reliability.
SetWorkingDir %A_ScriptDir%  ; Ensures a consistent starting directory.
Up::
    ; Wait for time to see if it is still pressed
    KeyWait, Up, T0.07
    if (ErrorLevel){
        ; Still being pressed, treat as shift
        Send {Shift Down}
        KeyWait, Up
        Send {Shift Up}
    } else {
        ; Was released before the timeout. Send normal up arrow
        Send {Up}
    }
return