本例子是从网上一个的代码更改过来，原先只有对网络数据进行拦截，后来经过本人的更改，实现了对文件（２ｋ和ｘｐ下测试过）的访问权限控制-this case from the Internet is a code change over, only to the original data network to intercept and were later I change and realize the right paper (2k and tested under xp) Access Control