[DllImport("user32.dll")]
        static extern bool BlockInput(bool fBlockIt);
        static void Main(string[] args)
        {
            Console.WriteLine("Hello I am Executing");
            BlockInput(true);
            Console.WriteLine("Blocked Input");


            Thread.Sleep(5000);
            BlockInput(false);
            Console.WriteLine("Block input release");
            Console.ReadLine();
        }