说明：  一个简单的VC++ 截包源代码，程序运行时的表现形式是MSDOS控制台，拦截到数据包时会在控制台会显示出来，并记入日志文件，仔细阅读代码，看看是如何拦截的吧。
(A simple cut-off of the VC++ source code package, the program run-time performance of the form of MSDOS console, to intercept the data packets will be displayed in the console and recorded in the log file, read the code carefully to see how the right to intercept .)