private void button1_Click(object sender, EventArgs e)
        {
            excuteCommand(@"c:\windows\system32\ping.exe", @"-t www.google.cn", new dReadLine(PrintMessage));
        }
        private void PrintMessage(string strLine)
        {
            this.textBox1.Text += strLine + " \r\n";
            this.textBox1.Update();
            Application.DoEvents();
        }