public void GetComList() { RegistryKey keyCom = Registry.LocalMachine.OpenSubKey("Hardware/DeviceMap/SerialComm"); if (keyCom != null) { string[] sSubKeys = keyCom.GetValueNames(); this.comboBox3.Items.Clear(); foreach (string sName in sSubKeys) { string sValue = (string)keyCom.GetValue(sName); this.comboBox3.Items.Add(sValue); } }