//Create Standalone SDK class dynamicly.
        zkemkeeper.CZKEMClass axCZKEM1 = new zkemkeeper.CZKEMClass();
        //the boolean value identifies whether the device is connected
        int iMachineNumber = 1;
        private void Connect_OnNewUser(string sIp = "10.0.0.44", int iPort = 4370, int iMachineNumber = 1)
        {
            //the boolean value identifies whether the device is connected
            bool bIsConnected = false;
            //the serial number of the device.After connecting the device ,this value will be changed.
            int idwErrorCode = 0;

            bIsConnected = axCZKEM1.Connect_Net(sIp, iPort);
            if (bIsConnected == true)
            {
                iMachineNumber = 1;//In fact,when you are using the tcp/ip communication,this parameter will be ignored,that is any integer will all right.Here we use 1.
                axCZKEM1.RegEvent(iMachineNumber, 65535);//Here you can register the realtime events that you want to be triggered(the parameters 65535 means registering all)

                this.axCZKEM1.OnNewUser += new zkemkeeper._IZKEMEvents_OnNewUserEventHandler(axCZKEM1_OnNewUser);
            }
            else
            {
                axCZKEM1.GetLastError(ref idwErrorCode);
                MessageBox.Show("Unable to connect the device,ErrorCode=" + idwErrorCode.ToString(), "Error");
            }
        }

        private void axCZKEM1_OnNewUser(int iEnrollNumber)
        {
            MessageBox.Show("RTEvent OnNewUser Has been Triggered..."+
                            "...NewUserID=" + iEnrollNumber.ToString());
        }

        private void Disconnect_OnNewUser()
        {
            axCZKEM1.Disconnect();
            this.axCZKEM1.OnNewUser -= new zkemkeeper._IZKEMEvents_OnNewUserEventHandler(axCZKEM1_OnNewUser);
        }