Hello dandersahn,
welcome to the community!
If you already use AHK you could add this piece of code into your AutoHotkey.ini
or use this as stand alone script:
qres.ahk
^!1:: Run qres.exe /x:640 | ; Ctrl+Shift+1 Changes resolution to 640 x 480.
|
^Numpad2:: Run qres.exe /x 1280 /y 1024 | ;Ctrl+NumPad2 Changes resolution to 1280 x 1024.
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The qres.exe must be in the same folder as the AHK script (or change the path in the script).