想在新开线程中访问主窗口的控件，比如在文本框中写入当前线程工作的状态，但是VS2008提示不可，帮助信息实在太多了，没有看懂，请指教！

下面是书上的例程：

 private void button1_Click(object sender, EventArgs e)
        {
            try
            {
                myIP = IPAddress.Parse(textBox1.Text);
            }
            catch
            {
                MessageBox.Show("IP地址格式错误，请重新输入！");
            }

            try
            {
                Thread thread = new Thread(new ThreadStart(accp));
                thread.Start();
                //accp();
            }
            catch (Exception ee)
            {
                textBox3.AppendText(ee.Message);
            }
        }

        private void accp()
        {
            myServer = new IPEndPoint(myIP, Int32.Parse(textBox2.Text));
            sock = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
            sock.Bind(myServer);
            sock.Listen(50);
            textBox3.AppendText("主机" + textBox1.Text + "端口" + textBox2.Text + "开始监听... ... \r\n"); //就是这句有问题啊！
            accSock = sock.Accept();
            if (accSock.Connected)
            {
                textBox3.AppendText("与客户建立联系");
                while (check)
                {
                    Byte[] Rec = new Byte[64];
                    NetworkStream netStream = new NetworkStream(accSock);
                    netStream.Read(Rec, 0, Rec.Length);
                    string RecMessage = System.Text.Encoding.BigEndianUnicode.GetString(Rec);
                    richTextBox1.AppendText(RecMessage + "\r\n");
                }
            }
        }

居然不能执行，晕死啊！

那该怎么办呢？这个是书上的原代码啊！很郁闷……

这条语句加在何处呢？提供例程的书是2002年出版的，那个时候可以执行上述代码而没有限制么？

改成这样成么？

        private void button1_Click(object sender, EventArgs e)
        {
            try
            {
                myIP = IPAddress.Parse(textBox1.Text);
            }
            catch
            {
                MessageBox.Show("IP地址格式错误，请重新输入！");
            }
            try
            {
                Thread thread = new Thread(new ThreadStart(accp));
                thread.Start();
                //accp();
            }
            catch (Exception ee)
            {
                textBox3.AppendText(ee.Message);
            }
        }

        public delegate void MyInvoke();
        
        private void accp()
        {
            MyInvoke mi = new MyInvoke(showServerMessage);
            BeginInvoke(mi);
        }

        public void showServerMessage()
        {
            myServer = new IPEndPoint(myIP, Int32.Parse(textBox2.Text));
            sock = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
            sock.Bind(myServer);
            sock.Listen(50);
            textBox3.AppendText("主机" + textBox1.Text + "端口" + textBox2.Text + "开始监听... ... \r\n");
            accSock = sock.Accept();
            if (accSock.Connected)
            {
                textBox3.AppendText("与客户建立联系");
                while (check)
                {
                    Byte[] Rec = new Byte[64];
                    NetworkStream netStream = new NetworkStream(accSock);
                    netStream.Read(Rec, 0, Rec.Length);
                    string RecMessage = System.Text.Encoding.BigEndianUnicode.GetString(Rec);
                    richTextBox1.AppendText(RecMessage + "\r\n");
                }
            }
        }

还是有错误啊！

看了一些资料，现在错误更加多了，5555555555……