iSpyApplication.MainForm.IsOnScreen C# (CSharp) Method

        private bool IsOnScreen(Form form)
        {
            Screen[] screens = Screen.AllScreens;
            var formTopLeft = new Point(form.Left, form.Top);
            //hack for maximised window
            if (form.WindowState == FormWindowState.Maximized)
            {
                formTopLeft.X += 8;
                formTopLeft.Y += 8;
            }

            return screens.Any(screen => screen.WorkingArea.Contains(formTopLeft));
        }