MFC下的编程技术是整个设计的核心。在仔细学习了孙鑫老师的视频教程后，对网络编程做了一次梳理，本道设计采用的是基本套接字SOCKET的编程，基于UDP实现。(The programming technology under MFC is the core of the whole design. After careful study of Sun Xin's video tutorial, the network programming done a comb, this design is the basic socket SOCKET programming, based on UDP implementation.
Protocol design. In order to send the client's Message to the server, some identification marks are added to the header to facilitate encapsulation and parsing. I)