SocketUDP

检测NAT类型的客户端，程序中指定了服务器IP地址，用户可以自行修改(Detect NAT type of the client, the program specifies the server IP address, the user can modify)

获取网络设置获取网络设置获取网络设置 获取网络设置(Access to the network settings to obtain network settings network settings to obtain access to network settings)

通过注册表获取计算机网络信息，如IP、掩码、计算机名和DNS信息(through access to the registry computer network information, such as IP, mask, computers and DNS information)

Pop3客户端接收信件的整个流程： 1。连接到pop3服务器（默认端口110） 2。发送用户名（user） 3。发送密码（pass） 4。查询当前邮箱状态（stat） 5。查询服务器上所有邮件UID列表（UIDL） 6。查询本地所有邮件的UID列表，从而罗列出新邮件列表（本地UID列表是POP3客户端记录在日志文件中的） 7。对所有新邮件查询其大小（LIST） 8。下载所有新邮件（RETR）利用List提供的邮件大小信息 9。如果有必要，对所有新邮件标志为删除（DELE） 10。结束对话（QUIT） 11。解析本地下载邮件。(Pop3 client receives the entire flow of letters: 1. Connect to the pop3 server (default port 110) 2. Send user name (user) 3. Send password (pass) 4. Query current mail status (stat) 5. Query server UID list of all messages (UIDL) 6. Query local UID list of all messages, which set out the new mailing list (local UID is a POP3 client list recorded in the log file) 7. For all new e-mail inquiries about their size (LIST) 8. Download all new messages (RETR) to use List of information provided by message size 9. If necessary, for all new signs for the delete message (DELE) 10. The end of the dialogue (QUIT) 11. Analysis of local download your mail.)

客户服务器TCP/IP通信程序利用WINSOCK编程(client-server TCP/IP communications programming procedures using Winsock)

通过MFC socket编程实现远程查看硬盘及文件夹和文件的功能(MFC socket programming function to remotely view the hard drive and the folders and files)

mongoose v6.15，多线程http——server，线程数可设。从GitHub下载C语言原代码，在vc6里面编译成c++工程(multi-threads http_server, based on source code from Github. The project is conducted in VC6, converted from c language. The threads num can be edited in code.)

Visual C++ 网络编程精选实例。TCP/IP,串口网络通信。配书光盘。(Visual C++ network programming selected examples. TCP/IP, serial network communications. CD-ROM with the book.)

可以参考直接使用S7协议连接西门子plc(You can refer to the direct use of the S7 protocol to connect SIEMENS PLC)

实现点对点发送文本聊天,P2P基于套接字发送和接收文本(Realize the point-to-point send text chat, P2P based on SOCKET to send and receive text)