这是用VB.net实现的一个简单的P2P示例。利用了UDP打洞技术，分服务器端跟客户端，服务器端负责登陆记录用户的IP和端口及转发打洞消息。原理到处都有，这里就没有贴出来。这里贴出了VB.net的代码，供初学者交流，也欢迎高手点评……

服务器端在启动成功后，输入help可以查看到服务器相关命令。

客户端在登陆成功后，输入help可以查看客户端相关命令(登陆时用户名随便)。-This is achieved using VB.net a simple example of P2P. Holes using the UDP technology, sub-server-side with the client, server-side landing record is responsible for the IP and port users and forwarding the news holes. Principle everywhere, do not paste it here. Posted here VB.net code exchange for beginners and experts welcome the comments ... ... server-side after a successful start, enter help to view the relevant command to the server. Success in landing the client, the input can help the client to view the relevant orders (not user name, when landing).