How to write a Basic Windows Driver

Its very simple. You just need to create three files.

sources [No extension please]


TARGETNAME = driver
TARGETPATH = obj
TARGETTYPE = DRIVER
INCLUDES   = %BUILD%\inc
LIBS       = %BUILD%\lib
SOURCES    = driver.c

makefile [No extension please]

!INCLUDE $(NTMAKEENV)\makefile.def

Driver.c [You can choose any name, it should just match with 'sources' file entry]


#include <ntddk.h>


VOID DriverUnload(PDRIVER_OBJECT pDriverObject)
{
    DbgPrint("Driver unloading\n");
}


NTSTATUS DriverEntry(PDRIVER_OBJECT DriverObject, PUNICODE_STRING RegistryPath) 
{
    DbgPrint("Hello, World\n");
DriverObject->DriverUnload = DriverUnload;


    return STATUS_SUCCESS; 
}

How to compile ?? 

Just install DDK

use Build env and choose the specific platform

go to directory where you have all these above 3 files.

run build command. That's It. You must get your SYS. Look around :)

Now, how to Load/Test ?

Simple, we will use Windows Service manager for it (as of now)

open command prompt (i am doing this on Windows XP)

run sc create driver binPath= c:\driver.sys type= kernel

[here the driver is the driver name (you can choose any name) and i have pasted my SYS file in C driver. Choose the path where your SYS file is]

That's it Done. ;)

How to Load this driver? 

Now open the command prompt and run command net start driver 

[here driver is my driver name, you can choose your name]

That's it. If you are running DebugView, you can see "hello, world" in your view.

How to unload this driver?

Just run net stop driver

[here, driver is my driver name, you can choose any name]

That;s it. If you are running DebugView, you can see 'driver unloading' statement in your view.

Is not that simple !!   :)