int DevLogin(ref DEV_INFO pdev)
        {
            if (Convert.ToBoolean(pdev.bSerialID))
            {
                int         maxDeviceNum = 100;
                DDNS_INFO[] pDDNSInfo    = new DDNS_INFO[maxDeviceNum];
                SearchMode  searchmode;
                int         nReNum = 0;
                searchmode.nType        = (int)SearchModeType.DDNS_SERIAL;
                searchmode.szSerIP      = pdev.szSerIP;
                searchmode.nSerPort     = pdev.nSerPort;
                searchmode.szSerialInfo = pdev.szSerialInfo;
                bool bret = Convert.ToBoolean(XMSDK.H264_DVR_GetDDNSInfo(ref searchmode, out pDDNSInfo, maxDeviceNum, out nReNum));
                if (!bret)
                {
                    return(0);
                }
                pdev.szIpaddress = pDDNSInfo[0].IP;
                pdev.nPort       = pDDNSInfo[0].MediaPort;
            }

            H264_DVR_DEVICEINFO OutDev;
            int nError = 0;

            XMSDK.H264_DVR_SetConnectTime(3000, 1);

            int lLogin = XMSDK.H264_DVR_Login(pdev.szIpaddress, Convert.ToUInt16(pdev.nPort), pdev.szUserName,
                                              pdev.szPsw, out OutDev, out nError, SocketStyle.TCPSOCKET);

            if (lLogin <= 0)
            {
                int nErr = XMSDK.H264_DVR_GetLastError();
                if (nErr == (int)SDK_RET_CODE.H264_DVR_PASSWORD_NOT_VALID)
                {
                    MessageBox.Show("Error.PwdErr");
                }
                else
                {
                    MessageBox.Show("Error.NotFound");
                }
                return(lLogin);
            }
            XMSDK.H264_DVR_SetupAlarmChan(lLogin);
            return(lLogin);
        }
        /*public int Connect(ref DEV_INFO pDev, int nChannel, int nWndIndex)
         * {
         *  Debug.WriteLine(DateTime.Now.ToString("HH:mm:ss - ") + TAG + ".Connect(" + pDev.szDevName + "," + nChannel.ToString() + "," + nWndIndex.ToString() + ")", "DVR INFO");
         *
         *  int nRet = 0;
         *
         *  //if device did not login,login first
         *  if (pDev.lLoginID <= 0)
         *  {
         *      H264_DVR_DEVICEINFO OutDev;
         *      int nError = 0;
         *      int lLogin = XMSDK.H264_DVR_Login(pDev.szIpaddress, (ushort)pDev.nPort, pDev.szUserName, pDev.szPsw, out OutDev, out nError, SocketStyle.TCPSOCKET);
         *      if (lLogin <= 0)
         *      {
         *          int nErr = XMSDK.H264_DVR_GetLastError();
         *          if (nErr == (int)SDK_RET_CODE.H264_DVR_PASSWORD_NOT_VALID)
         *          {
         *              MessageBox.Show(("Error.PwdErr"));
         *          }
         *          else
         *          {
         *              MessageBox.Show(("Error.NotFound"));
         *          }
         *
         *          return nRet;
         *      }
         *
         *      pDev.lLoginID = lLogin;
         *      XMSDK.H264_DVR_SetupAlarmChan(lLogin);
         *  }
         *
         *  //isConnected = true;
         *
         *  int nWnd = m_nCurIndex;
         *  if (nWndIndex >= 0)
         *  {
         *      nWnd = nWndIndex;
         *  }
         *
         *  if (nWnd >= m_nTotalWnd)
         *  {
         *      return nRet;
         *  }
         *
         *  return m_videoform[nWnd].ConnectRealPlay(ref pDev, nChannel);
         * }*/

        /*public void SetColor(uint nBright, uint nContrast, uint nSaturation, uint nHue)
         * {
         *  IntPtr lPlayHandle = m_videoform[m_nCurIndex].Handle;
         *  unsafe
         *  {
         *      if (lPlayHandle.ToPointer() == null)
         *      {
         *          return;
         *      }
         *  }
         *
         *  m_videoform[m_nCurIndex].SetColor((int)nBright, (int)nContrast, (int)nSaturation, (int)nHue);
         *  SetDevChnColor(nBright, nContrast, nSaturation, nHue);
         * }*/

        /*public void PtzControl(uint dwBtn, bool dwStop)
         * {
         *  long lPlayHandle = m_videoform[m_nCurIndex].GetHandle();
         *  if (lPlayHandle <= 0)
         *  {
         *      return;
         *  }
         * }*/

        /*public void KeyBoardMsg(uint dwValue, uint dwState)
         * {
         *  IntPtr lPlayHandle = m_videoform[m_nCurIndex].Handle;
         *  unsafe
         *  {
         *      if (lPlayHandle.ToPointer() == null)
         *      {
         *          return;
         *      }
         *  }
         *
         *  SDK_NetKeyBoardData vKeyBoardData;
         *  vKeyBoardData.iValue = (int)dwValue;
         *  vKeyBoardData.iState = (int)dwState;
         *  m_nCurIndex = m_nCurIndex < 0 ? 0 : m_nCurIndex;
         *  if (!XMSDK.H264_DVR_ClickKey(m_videoform[m_nCurIndex].m_lLogin, ref vKeyBoardData))
         *     MessageBox.Show("AccountMSG.Failed");
         * }*/

        /*public void NetAlarmMsg(uint dwValue, uint dwState)
         * {
         *  if (m_devInfo.lLoginID > 0)
         *  {
         *      SDK_NetAlarmInfo vAlarmInfo;
         *      vAlarmInfo.iEvent = 0;
         *      vAlarmInfo.iState = (int)(dwState << (int)dwValue);
         *      m_nCurIndex = m_nCurIndex < 0 ? 0 : m_nCurIndex;
         *      if (!XMSDK.H264_DVR_SendNetAlarmMsg(m_devInfo.lLoginID, ref vAlarmInfo))
         *          MessageBox.Show("AccountMSG.Failed");
         *  }
         * }*/

        /*public void SetDevInfo(ref DEV_INFO pDev)
         * {
         *  m_devInfo = pDev;
         * }*/

        public void ReConnect(object source, ElapsedEventArgs e)
        {
            Debug.WriteLine(DateTime.Now.ToString("HH:mm:ss - ") + TAG + ".ReConnect(source,e)", "DVR INFO");

            Dictionary <int, DEV_INFO> dictDiscontDevCopy = new Dictionary <int, DEV_INFO>(dictDiscontDev);

            foreach (DEV_INFO devinfo in dictDiscontDevCopy.Values)
            {
                H264_DVR_DEVICEINFO OutDev = new H264_DVR_DEVICEINFO();
                int nError = 0;

                int lLogin = XMSDK.H264_DVR_Login(devinfo.szIpaddress, (ushort)devinfo.nPort, devinfo.szUserName, devinfo.szPsw, out OutDev, out nError, SocketStyle.TCPSOCKET);
                if (lLogin <= 0)
                {
                    int nErr = XMSDK.H264_DVR_GetLastError();
                    if (nErr == (int)SDK_RET_CODE.H264_DVR_PASSWORD_NOT_VALID)
                    {
                        MessageBox.Show(("Password Error"));
                    }
                    else if (nErr == (int)SDK_RET_CODE.H264_DVR_LOGIN_USER_NOEXIST)
                    {
                        MessageBox.Show(("User Not Exist"));
                    }

                    return;
                }
                dictDiscontDev.Remove(devinfo.lLoginID);

                DVR2Mjpeg clientForm = new DVR2Mjpeg(true);

                foreach (Form form in Application.OpenForms)
                {
                    if (form.Name == "DVR2Mjpeg")
                    {
                        clientForm = (DVR2Mjpeg)form;
                        break;
                    }
                }
                DEV_INFO devAdd = new DEV_INFO();
                devAdd          = devinfo;
                devAdd.lLoginID = lLogin;

                foreach (TreeNode node in clientForm.devForm.DevTree.Nodes)
                {
                    if (node.Name == "Device")
                    {
                        DEV_INFO dev = (DEV_INFO)node.Tag;
                        if (dev.lLoginID == devinfo.lLoginID)
                        {
                            if (this.InvokeRequired)
                            {
                                this.BeginInvoke((MethodInvoker)(() =>
                                {
                                    node.Text = devAdd.szDevName;
                                    node.Tag = devAdd;
                                    node.Name = "Device";
                                }));
                            }
                            else
                            {
                                node.Text = devAdd.szDevName;
                                node.Tag  = devAdd;
                                node.Name = "Device";
                            }
                            foreach (TreeNode channelnode in node.Nodes)
                            {
                                CHANNEL_INFO chInfo = (CHANNEL_INFO)channelnode.Tag;
                                if (chInfo.nWndIndex > -1)
                                {
                                    if (InvokeRequired)
                                    {
                                        BeginInvoke((MethodInvoker)(() =>
                                        {
                                            int iRealHandle = clientForm.m_videoform[chInfo.nWndIndex].ConnectRealPlay(ref devAdd, chInfo.nChannelNo);
                                            if (iRealHandle > 0)
                                            {
                                                isConnected = true;
                                                chanelOpened++;
                                            }
                                        }));
                                    }
                                    else
                                    {
                                        int iRealHandle = clientForm.m_videoform[chInfo.nWndIndex].ConnectRealPlay(ref devAdd, chInfo.nChannelNo);
                                        if (iRealHandle > 0)
                                        {
                                            isConnected = true;
                                            chanelOpened++;
                                        }
                                    }
                                    Thread.Sleep(100);
                                }
                            }
                            break;
                        }
                    }
                }

                dictDevInfo.Add(lLogin, devAdd);
                XMSDK.H264_DVR_SetupAlarmChan(lLogin);
            }

            if (0 == dictDiscontDev.Count)
            {
                timerDisconnect.Enabled = false;
                timerDisconnect.Stop();
            }
        }