Not sure if this has changed, but you cant actually guarantee from application that vsync will be on. Users control panel settings can (will?) override settings that your application requested.

More about: https://www.opengl.org/wiki/Swap_Interval

Correct - there is no actual way on Windows to _guarantee_ vsync, as far as I know anyway. You can only request vsync, and maybe you get it, maybe you don't.

We haven't gotten there yet :) We're not even asking for vsync yet.

- Casey