void DetectSerialPorts() {
                  try {
                       serialPorts = System::IO::Ports::SerialPort::GetPortNames();
                                                            }
                             catch (Exception^ exc) {
                                     MessageBox::Show("Problem detecting ports...");
                                     return;
                             }
                     }


    void AddToList() {
            comboBox1->Items->Clear();
            for each (String^ serial in serialPorts) {
                            comboBox1->Items->Add(serial);
            }
    }


private: System::Void button4_Click(System::Object^  sender, System::EventArgs^  e) {
    void DetectSerialPorts();
    void AddToList();