Zoom goes behind the Windows task bar when going fullscreen when a meeting starts

This mostly obscures the audio and video buttons at the lower left corner. On top of that, it looks bad.

I'm a longtime Windows and Mac developer, so I think you need to do more than just get the main desktop size. 😉

I'd start with a search: taskbar height site:stackoverflow.com

You also want to check whether the taskbar is visible or not, and it can be on the sides or top of the screen, so take that into account.