.486p

.model  flat,STDCALL
include  win32.inc

extrn            MessageBoxA:PROC
extrn            ExitProcess:PROC

.data

HelloWorld db "Hello, world!",0
msgTitle db "Hello world program",0

.code
Start:
         push    offset msgTitle
         push    offset HelloWorld
         push    0
         call    MessageBoxA

         push 0
         call ExitProcess
ends
end Start