窗体控件的多线程操作

下面代码不多，但是是我上个月花了很长时间才写出来，不现在回过头再研究研究，其实也不难。
在其他的线程里，不能直接操作主窗体上的控件，必须通过IAsyncResult接口来调用（invoke）主窗口上的方法，来操作窗口上的控件。

public System.Threading.Thread T_HcpChecker;             
delegate void M_HcpChecker(bool checker,int index);



private void checkdvr()
        {
            
            
           
            System.Windows.Forms.TreeNode node = this.treeView1.SelectedNode;
            string[] s = new string[3];
            s = (string[])node.Tag;
            tbIP.Text = s[0];
            tbChannel.Text = s[1];
            hcp.hcPlayer1.DVRIP = s[0].Replace(" ", "");
            Int32 d = Int32.Parse(s[1]);
            hcp.hcPlayer1.Channel = d;
            this.button1.Enabled = false;

            ShowMessage("Please wait……");
            
            //创建线程
            ooindex = this.treeView1.SelectedNode.Index;
            T_HcpChecker = new System.Threading.Thread(new System.Threading.ThreadStart(Asy_HcpChecher));
            T_HcpChecker.Start();
                                        
              
               
          
        }
        
         
//线程上的方法
 private void Asy_HcpChecher()
        {

            bool logfail;
            if (!(hcp.hcPlayer1.HCPlayerInit() && hcp.hcPlayer1.HCPlayerLogin()))
            {

                logfail = true;

            }
            else
            {

                logfail = false;

            }
            try
            {
                //调用主窗口上的方法；
                IAsyncResult result = this.BeginInvoke(new M_HcpChecker(HcpChecker), new object[] { logfail, ooindex });
                object returnValue = this.EndInvoke(result);
            }
            catch { }


        }
        
        public void ShowMessage(string msg)
        {
            hcp.showMessage(msg);
            this.labelMessage.Text = msg;
            this.labelMessage.Refresh();
        }
        


private void  HcpChecker(bool logfail,int index)
        {
            
            if (ooindex == this.treeView1.SelectedNode.Index)
            {
                if (logfail)
                    ShowMessage("网络忙或注册失败！");
                else
                {
                    
                    this.button1.Enabled = true;
                    ShowMessage("DVR注册成功！");
                    
                    if (isPlayDvr)
                        playdvr();
                    hcp.hideMessage();
                }

                this.treeView1.Enabled = true;
                ooindex = -1;
            }
        }