2种方式读取本机所有COM端口+禁止窗体拖曳

　　　public void AllComNameOne()
        {
            //1,读取本机所有Com端口
            RegistryKey keyCom = Registry.LocalMachine.OpenSubKey("HardWare\\DeviceMap\\SerialComm");
            if (keyCom != null)
            {
                string[] sSubKeys = keyCom.GetValueNames();
                this.cbPort.Items.Clear();
                foreach (string name in sSubKeys)
                {
                    string sValue = (string)keyCom.GetValue(name);
                    this.cbPort.Items.Add(sValue);
                }
            }
        }

        public void AllComNameTwo()
        {
            //2,读取本机所有Com端口
            this.cbSerialPort.Items.Clear();
            string[] comNames = SerialPort.GetPortNames();
            foreach (string comName in comNames)
            {
                this.cbSerialPort.Items.Add(comName);
            }
        }

 

　　　/// <summary>
        /// 禁止窗体拖曳
        /// </summary>
        /// <param name="m"></param>
        protected override void WndProc(ref Message m)
        {
            if (m.Msg == 0xA1 && m.WParam.ToInt32() == 2)
                return;
            base.WndProc(ref m);
        }