这是要编译成EXE文件时遇到的问题 请问是哪里错了？

以下是源码
————————————————
.486
.Model Flat, StdCall

Option CaseMap:None

includelib \masn32\lib\kernel32.lib
includelib \masn32\lib\user32.lib

include \masn32\INCLUDE\user32.inc
include \masn32\INCLUDE\windows.inc
include \masn32\INCLUDE\kernel32.inc

.data
msgtitle db "Hellow world!",0
msgtitle db "This is a messagebox",0

.code

start:
invoke messagebox, null,addr msgtext,addr msgtitle, MB_OK or mb_iconinformation

end start
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[此贴子已经被作者于2007-5-3 13:14:40编辑过]

.486
.Model Flat, StdCall

Option CaseMap:None

includelib kernel32.lib
includelib user32.lib

include user32.inc
include windows.inc
include kernel32.inc

.data
msgtitle db "Hellow world!",0
msgtext db "This is a messagebox",0

.code

start:
invoke MessageBox, NULL,offset msgtext,offset msgtitle, MB_OK or MB_ICONINFORMATION

end start

可能是invoke的时候与哪块内存有冲突吧，具体也不知道，不过可以用下面这段试试
.486
.Model Flat, StdCall

Option CaseMap:None

includelib kernel32.lib
includelib user32.lib

include user32.inc
include windows.inc
include kernel32.inc

.data
msgtitle db "Hellow world!",0
msgtext db "This is a messagebox",0

.code

start:
push MB_OK+MB_ICONINFORMATION
push offset msgtitle
push offset msgtext
push NULL
call MessageBox
ret
end start