private void ShakeWindow()
        {
            Random ran = new Random();
            System.Drawing.Point point = this.Location;
            for (int i = 0; i < 30; i++)
            {
                this.Location = new System.Drawing.Point(point.X + ran.Next(8), point.Y + ran.Next(8));
                System.Threading.Thread.Sleep(15);
                this.Location = point;
                System.Threading.Thread.Sleep(15);
            }
        }