资源里提供了一个PDF文件，和一个打开该文件所需的密码，文件内容为介绍网络中间层驱动的工作原理和系统的讲述网络中间层驱动的编程步骤，只需按文件步骤操作，就可轻松学习驱动编程。希望该课件对学有所需的同学们有用！-Resources to provide a PDF file, and a password required to open the file, the contents of the file only by file step to introduce the programmin