Question

I would like to overlay a gray, translucent area over the entire screen through C#. Is this possible to do through Windows Forms and how would I go about doing this?

Answer 1

Sure, just create a borderless, translucent window that covers all of the desktop screens.

You can find the right Rectangle to cover all of the screens with the following LINQ:

Rectangle bounds = Screen.AllScreens
                       .Select(x => x.Bounds)
                       .Aggregate(Rectangle.Union);

Then set the Left, Top, Width and Height of the Window from bounds