vb与西门子plc的modbus tcp通讯程序-vb and Siemens plc, modbus tcp communication program

此系统为VB通过winsock实现客户端与服务器端的之间的通信，对于winsock的一些基础知识都得到了实现，对于初学者来说是一份挺不错的学习资料-The system adopted for the VB winsock to achieve client and server side communication between some of the basics of winsock have been realized, for beginners is a very good lea