Here’s a handy Resizable GUI in AutoHotkey Function in AutoHotkey that I used to use a lot more (before I had access to the Debug window in AHK Studio and Output Window in SciTE4AutoHotkey)
You can learn how to create simple AutoHotkey GUIs in our Intro to GUIs in AutoHotkey Udemy course
Resizable GUI in AutoHotkey
Code for Resizable AutoHotkey GUI Function in AutoHotkey