说明：  串口通信是 Windows 应用软件开发的重要环节，除了普通的通信软件外，还在工业控制领域有广泛的用途，因此掌握串口编程是每个程序员的必备技巧。
(Serial communication is an important part of Windows application software development, in addition to ordinary communication software, there is a wide range of applications in the field of industrial control.)