while: wend

[bplus]

Now I'm confused for the first time in 2023.

LOL my work is done!

Seriously the lesson is that _MouseInput has to be in it's own tight little loop with no _LIMIT other wise it will use the _Limit in the main loop in which it sits and slow down all the other processing going on.

So, the reason behind the one-line:
While _MouseInput: Wend

or a variation with just a single GoTo
10 If _MouseInput Then Goto 10 ' don't tie up the rest of the loop handling _MouseInput