private void button3_Click(object sender, EventArgs e) { int idwErrorCode = 0; Cursor = Cursors.WaitCursor; if (btnUSBConnect.Text == "Disconnect") { axCZKEM1.Disconnect(); bIsConnected = false; btnUSBConnect.Text = "Connect"; btnUSBConnect.Refresh(); lblState.Text = "Current State:Disconnected"; Cursor = Cursors.Default; return; } if (rbUSB.Checked == true) //the common USBClient { iMachineNumber = 1; //In fact,when you are using common USBClient communication,parameter Machinenumber will be ignored,that is any integer will all right.Here we use 1. bIsConnected = axCZKEM1.Connect_USB(iMachineNumber); } //else // if (rbVUSB.Checked == true)//connect the device via the virtual serial port created by USB // { // SearchforUSBCom usbcom = new SearchforUSBCom(); // string sCom = ""; // bool bSearch = usbcom.SearchforCom(ref sCom);//modify by Darcy on Nov.26 2009 // if (bSearch == false)//modify by Darcy on Nov.26 2009 // { // MessageBox.Show("Can not find the virtual serial port that can be used", "Error"); // Cursor = Cursors.Default; // return; // } // int iPort; // for (iPort = 1; iPort < 10; iPort++) // { // if (sCom.IndexOf(iPort.ToString()) > -1) // { // break; // } // } // iMachineNumber = Convert.ToInt32(txtMachineSN2.Text.Trim()); // if (iMachineNumber == 0 || iMachineNumber > 255) // { // MessageBox.Show("The Machine Number is invalid!", "Error"); // Cursor = Cursors.Default; // return; // } // int iBaudRate = 115200;//115200 is one possible baudrate value(its value cannot be 0) // bIsConnected = axCZKEM1.Connect_Com(iPort, iMachineNumber, iBaudRate); // } if (bIsConnected == true) { btnUSBConnect.Text = "Disconnect"; btnUSBConnect.Refresh(); lblState.Text = "Current State:Connected"; axCZKEM1.RegEvent(iMachineNumber, 65535);//Here you can register the realtime events that you want to be triggered(the parameters 65535 means registering all) } else { axCZKEM1.GetLastError(ref idwErrorCode); MessageBox.Show("Unable to connect the device,ErrorCode=" + idwErrorCode.ToString(), "Error"); } Cursor = Cursors.Default; }