Ease of Auto Set/Reset DPI with AHK V2 Script

This AutoHotkey v2 script is really a function that youc can call. There are two main uses

1. Get (and save) the current DPI on the primary monitor.  Then it changes the DPI to 100 (or whatever you choose)
2. Restore the DPI on the primary monitor to it’s original setting 

Automatically setting the DPI on your primary monitor with AutoHotkey