最新VB上位机参考书籍，主要讲述的是串口通讯，详尽丰富的例子，通俗易懂，可以缩短开发时间，也是新手学习的好工具。-Last VB PC reference books, mainly about serial communication, detailed examples of rich, easy to understand, you can shorten development time, but also a good tool for beginners to learn.