利用tcp进行的网络通信源代码， 经过测试可以实现-use the network communication source code, the test can be achieved

用WINSOCK建立通信基础，FTP服务器，多个CLIENT可以通过请求连接到服务器，CLIENT之间可以进行通信。-WINSOCK communications set up with basic, FTP server, multiple CLIENT can request to connect to the server, CLIENT can communicate between.