int key_press_ = 0;
        private void button5_Click(object sender, EventArgs e)
        {
            if (key_press_ == 0)
            {
                //this.Enabled = false;
                //this.button5.Enabled = true;
                timer2.Enabled = true;
                timer2.Interval = 1000;
                timer2.Start();
                key_press_++;
            }
            else
            {
                //this.Enabled = true;
                timer2.Stop();
                key_press_ = 0;
            }
            
        }

        private void timer2_Tick(object sender, EventArgs e)
        {
            System.Threading.Thread.Sleep(10000000);
        }