.386 
.model flat,stdcall 
option casemap:none 
include \masm32\include\windows.inc 
include \masm32\include\kernel32.inc 
includelib \masm32\lib\kernel32.lib 
include \masm32\include\user32.inc 
includelib \masm32\lib\user32.lib 

.data 
MsgBoxCaption  db "Antichat",0 
MsgBoxText       db "Hello World!",0 

.code 
start: 
invoke MessageBox, NULL, addr MsgBoxText, addr MsgBoxCaption, MB_OK 
invoke ExitProcess, NULL 
end start