** Introduction

This is (an incomplete) guide to writing device drivers (and other kernel
extensions) for ReactOS.

** Setting up the build environment

Create a new subdirectory in the modules directory and copy one of the
existing module makefiles into it. Customize the makefile to compile the
source files for the module. Note: generally it is not necessary to specify
the compiler or compiler flags to use.

** Initializing a module

On loading the kernel will call the module function

PROTOTYPE:

       NTSTATUS ModuleEntry(PDRIVER_OBJECT DriverObject, 
                            PUNICODE_STRING RegistryPath)

PURPOSE:

       Initializing the module
       
ARGUMENTS:

       DriverObject = Pointer to an object describing the driver
       RegistryPath = Currently NULL
 
RETURNS:

       STATUS_SUCCESS = If the module initialized successfully