win32单例执行

 1 BOOL IsAlreadyRun()
 2 
 3 {
 4 
 5 　　　　HANDLE hMutex  = NULL;
 6             hMutex = ::CreateMutex(NULL,FALSE,"Application");
 7             if(hMutex)
 8            {
 9                 if(ERROR_ALREADY_EXIST==::GetLastError())
10                 {
11                     return TRUE;
12                  } 
13             }
14             return FALSE;
15 }
16 
17