在应用程序设计过程中，将大量使用这些对象。
These objects are used heavily during the application design process.
驱动程序是硬件和客户应用程序间通信的桥梁，文中介绍了USB的WDM功能驱动程序设计过程；
Function driver is the bridge between hardware and host software, and the design process of the WDM (Windows Driver Mode) driver for the USB was introduced here;
该类实现了不同数据类型组织的透明化，简化了程序设计过程，为用户提供了一个友好的编程接口环境。
The class implements the vitrification of the arrangement for different data class, predigests the programming process and provides a friendly interface environment for the program.
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