Hi folks,

This is an idea I've been playing around with off and on for quite some time. I wrote a crude console application to do this about a year ago, and recently I got the motivation to rework that code into something more useful. Then I started to lose the motivation so I figured I'd finish it off and dump a release out.

Basically, you plug two mice in at the same time, move them together as one, and the program will measure the difference in what they report to the OS. This can tell you the ratio of DPI between the two mice. If you find that the DPI ratio changes depending on what speed you were moving the mice, that tells you that there's acceleration going on. You can also detect lag by comparing how long it takes one mouse to report movement after the other one does, following a dead stop -- but typically there isn't a real difference and it just comes down to when they poll, so don't worry about this too much.

If you think my program sucks but the idea is decent, and you can code in any language, you may be interested in knowing that MouseChef uses [url=https://github.com/rspeele/MouseMeat]another standalone exe called MouseMeat[/url] to handle raw input and output it as JSON, which you can easily write your own program to analyze. This saves you from dealing with the windows API directly.

Anyway, here's the link:
[url=https://github.com/rspeele/MouseChef]README[/url] [url=https://github.com/rspeele/MouseChef/releases]download[/url]