说明：  介绍了TCP/ IP协议下网络数据的传输过程, 并且分析了数据包的捕获原理, 同时概述了WinPcap的 结构组成。最后, 使用VC++编程实现了基于WinPcap的网络数据包捕获和简单分析, 并给出了实验结果。
(Introduced the TCP/IP protocol under the network data transmission and analysis of packet capture theory, and outlines the structure and composition of WinPcap. Finally, the use of VC++ programming based on the WinPcap packet capture of network data and simple analysis, and experimental results are given.)