定时器的问题 求高手指点下 编译可以通过 但是生成的exe达不到想要的效果

.386
.model flat,stdcall
option casemap:none

include windows.inc
include user32.inc
include kernel32.inc
includelib user32.lib
includelib kernel32.lib

.data
dwCount dd 60
szCaption db "定时"
szText    db "1分钟已到"


.data?
hInstance dd ?

idTimer   dd ?
.code

_ProcTimer proc _hWnd,uMsg,_idEvent,_dwTime
   
    pushad
    invoke MessageBox,NULL,offset szText,offset szCaption,MB_OK
    invoke KillTimer,NULL,idTimer
    popad
    ret

_ProcTimer endp





start:
invoke SetTimer,NULL,NULL,60000,addr _ProcTimer
mov idTimer,eax
invoke    ExitProcess,NULL
end start