Introduction

Driver Interfaces Yet another way of categorizing a driver is by the interface it presents to the applica­ tion and the OS kernel. All Windows NT drivers use the same exact interface to the NT kernel. The kernel in turn provides a standard interface which applications can use to call any driver (open, read, etc.). The privileged driver package in Windows, the VxD, is different. Although all Windows VxDs use the same kernel interface, there is no standard interface to a VxD from the application level. Instead, each VxD defines its own application interface.