集合问题

HANDLE hMutex; // Create a mutex with no initial owner.hMutex = CreateMutex( 
    NULL,                       // no security attributes
    FALSE,                      // initially not owned
    "MutexToProjectSet");       // name of mutexif (hMutex == NULL) 
{
    // Check for error.
}
BOOL FunctionToWriteToSet(HANDLE hMutex) 
{ 
    DWORD dwWaitResult;     // Request ownership of mutex.
 
    dwWaitResult = WaitForSingleObject( 
        hMutex,   // handle to mutex
        5000L);   // five-second time-out interval
 
    switch (dwWaitResult) 
    {
        // The thread got mutex ownership.
        case WAIT_OBJECT_0: 
            __try { 
                // Write to the set.
            }             __finally { 
                // Release ownership of the mutex object.
                if (! ReleaseMutex(hMutex)) { 
                    // Deal with error.
                }             break; 
        }         // Cannot get mutex ownership due to time-out.
        case WAIT_TIMEOUT: 
            return FALSE;         // Got ownership of the abandoned mutex object.
        case WAIT_ABANDONED: 
            return FALSE; 
    }    return TRUE; 
}