void Get_serialport(){
        HKEY hKey;
        if (::RegOpenKeyEx(HKEY_LOCAL_MACHINE, "Hardware\\DeviceMap\\SerialComm", NULL, KEY_READ, &hKey) == ERROR_SUCCESS){// 開啟串列埠登錄檔
            int i = 0;
            char portName[256], commName[256];
            DWORD dwLong, dwSize;
            while
 
 (1)
            {
                dwLong = dwSize = sizeof(portName);
                if (::RegEnumValue(hKey, i, portName, &dwLong, NULL, NULL, (PUCHAR)commName,
                    &dwSize) == ERROR_NO_MORE_ITEMS) // 列舉串列埠
                    break;

                PortList.Add(commName); // commName就是串列埠名字
 

                i++;
            }
        }
    }