发一个用VC写的通过串口和PLC通讯的小东西，可以设置串口，和一些简单的PLC试过，我感觉对学习VC穿口有帮助-Send a written with the VC and the PLC communications via the serial port of small things, you can set the serial port, and some simple PLC tried, I feel I have in learning to help VC Wear