能使用TCP打洞的源程序，不是前面所说的是UDP打洞原理！

本程序为多媒体通信的server端的源码（ VC++ 6.0 以上版本）-the procedures for multimedia communications server side of the source (VC version 6.0 and above)

同步套接字客户端-synchronization socket client

模拟Router的RIP协议，通过传输的文字进行传输和回送，进行模拟和实现。-NOTE: Simulating Router s RIP protocol,it transports and echoplexes by character trasported,and Simulats and implements.

用 Winsock 控件，使你的系统时间与格林尼汉标准时间同步。-Winsock control, the system allows you time and Greenwich-time synchronization standards.

完整端口的编程,代码精良,设计完整.希望大家继续完善-Port complete programming, code well, design integrity. I hope you will continue to improve

本系统属于小型的局域网监控系统，可以对某一台计算机进行屏幕监控，本系统主要实现以下功能：  系统采用人机交互的方式，界面美观友好。  屏幕信息需要时时显示，网络延时不能大于1秒。  服务器端可以随时运行，只要客户端运行，就能够显示屏幕信息。  系统运行时占用内存不能大于10MB，以免影响系统性能。  客户端运行时需要隐藏显示窗口，起其感觉不到在运行。 -This system belongs to a small local area network monitoring system that can carry out the screen of a computer monitor, this system is mainly to achieve the following features:  system uses human-computer interaction approach, friendly and beautiful interface.  screen displays information needs from time to time, the network delay can not exceed 1 second.  server-side ready to run, as long as the client is running, you can display on-screen information.  memory for the system is running can not be larger than 10MB, so as not to affect system performance.  the client run-time to hide the display window, from the feel running.

捕获数据包-Packet capture

简单的局域网传送文件示例可用于网络编程入门学习离实用还有些距离-simple example LAN transmission of documents to be used in network programming from the practical learning portal also some distance

获取网上邻居 IP地址和计算机名之间的转换 映射网络驱动器-access online neighbors IP address and the computer name of the conversion between mapping network drives

局域网聊天客户端与服务器端程序，可以传送文件，具有可扩展性，基于Winsock的VC编程。-LAN chat client and server-side program, you can transfer files with scalability, the VC based on Winsock programming.