public static bool IsForegroundFullScreen(System.Windows.Forms.Screen screen)
{
if (screen == null)
{
screen = System.Windows.Forms.Screen.PrimaryScreen;
}
RECT2 rect = new RECT2();
IntPtr hWnd = (IntPtr)GetForegroundWindow();
GetWindowRect(new HandleRef(null, hWnd), ref rect);
if (screen.Bounds.Width == (rect.right - rect.left) && screen.Bounds.Height == (rect.bottom - rect.top))
{
return(true);
}
else
{
return(false);
}
}
private static extern bool GetWindowRect(HandleRef hWnd, [In, Out] ref RECT2 rect);
