.386.model flat, stdcall
option casemap: none
include windows.inc
include kernel32.inc
include user32.inc
includelib kernel32.lib
includelib user32.lib.data
szCaption db "Hello", 0
szText db "Hello World!", 0.code
main PROC
INVOKE MessageBox, NULL, addr szText, addr szCaption, MB_OK
INVOKE ExitProcess, 0
main ENDP
END main