窗体抖动...仿MSN.............
      
            int formwinL = this.Left;            
            int formwinT = this.Top;            

            Random randomx = new Random();
           
            for (int i = 0; i < 100; i++)
            {
                int x = randomx.Next(i+2-1);
                int y = randomx.Next(i+2-1);
                if (x % 2 == 0)
                {
                    this.Left = this.Left + x;
                }
                else
                {
                    this.Left = this.Left - x;
                }
                if (y % 2 == 0)
                {
                    this.Top = this.Top + y;
                }
                else
                {
                    this.Top = this.Top - y;
                }

                this.Left = formwinL;            //还原原始窗体原始位置.
                this.Top = formwinT;             //还原原始窗体原如位置.
            }