Kernel mode driver Coding

i am trying to code some device drivers and im kinda stuck ... i have a few questions Smile

this is what i have for now:

Code:

format PE native 4.0 at 10000h
entry DriverEntry

; include windowz 32 header
include 'win32a.inc'

struct UNICODE_STRING
 Length          dw ?
 MaximumLength   dw ?
 Buffer          dd ?                    ; offset
ends

section '.text' code readable executable

proc DriverEntry, DriverObject, RegPath

start:
         pusha

         invoke     RtlInitUnicodeString, driver_us, driver_name
         invoke     IoCreateDevice,dword [DriverObject], NULL, driver_name, FILE_DEVICE_UNKNOWN, NULL, NULL, driver_object
endp



section '.data' data readable writable

driver_object       dd ?

driver_us           UNICODE_STRING
driver_name     du  "\Device\kmd",0

symlink         du  "\??\kmd0",0
sym_us              UNICODE_STRING


section '.idata' import data readable writable

  library ntoskrnl,                    'ntoskrnl.exe'


  import  ntoskrnl,\
          IoCreateDevice,              'IoCreateDevice',\
          RtlInitUnicodeString,        'RtlInitUnicodeString'

is the stuff in the data section defined correctly or am i missing something ? and why is that 'at 10000h' needed when declaring the format ? if everything is okay with the code , and if i make a loader for this driver could this code actually work ?
im really a beginner in coding KMD's and people arent talking much about coding KMD's on this forum .. so its kinda hard.

thanks in advance,
smoke