CreateMutex.asm

.386

.model flat, stdcall

option casemap:none

include kernel32.inc

includelib kernel32.lib

include user32.inc

includelib user32.lib

.code

correy db "correy",0

szbody db "结束本程序的这个实例吧！",0

sztitle db "本程序的一个实例已经运行",0

szrun db "只能运行本程序的一个实例！",0

start:

invoke CreateMutex,0,0,addr correy;创建与打开成功，此时eax的值是非零。

invoke GetLastError

.if eax == 183 ;CreateMutex创建成功时返回零，打开成功时返回183.

  invoke MessageBox,0,addr szbody,addr sztitle,0

  ret ;invoke ExitProcess,0 

.endif

invoke MessageBox,0,addr szrun,addr szrun,0

ret 

end start

;made at 2010.05.28