说明：  本文分三部分来介绍如何构造一个简单的USB过滤驱动程序，包括“基本原理”、“程序的 实现”、“使用INF安装”。此文的目的在于希望读者了解基本原理后，可以使用除DDK以 外最流行也最方便的驱动开发工具DriverStudio来实现一个自己的过滤驱动，并正确地安 装。
(how to structure a simple USB filter driver, "basic principles", "Implementation of procedures", "use the INF installation." The purpose of this article is to encourage the readers to understand the basic principles, DDK can be used in addition to other than the most common and also the most convenient driver development tool to achieve a DriverStudio of their own filter driver, and proper installation.)