一个个人版的防火墙，功能还算可以，可供网络编程与VC中等程度者使用-version of a personal firewall can still function for network programming with VC moderate use

In research network traffic and firewall TCP/IP packet capture, the basis of the principle of using object-oriented method, the requirement analysis and design functions. In this system, the development VisualC++ 6.0 environment, the comprehensive ad