可以在任意地方Sleep了，避免使用Sleep函数造成界面卡顿甚至崩溃问题

typedef struct {
    UINT iDelayTime;
    HANDLE delayEvent;
}tDelay;


UINT ThreadDelay(LPVOID pParam)
{
    tDelay *delay = (tDelay*)pParam;
    Sleep(delay->iDelayTime);
    //等待一段事件后将事件设为有信号
    SetEvent(delay->delayEvent);
    return 0;
}

void MyDelay(int iDelayTime)
{
    //不需要延时
    if (iDelayTime <= 0)
    {
        return;
    }

    tDelay *pDlay = new tDelay;
    pDlay->iDelayTime = iDelayTime;
    //初始化一个不自动复原初始值为false的事件
    pDlay->delayEvent = CreateEvent(NULL, FALSE, FALSE, NULL);
    //创建线程
    HANDLE m_threadDelay;
    m_threadDelay = AfxBeginThread(ThreadDelay, pDlay);

    MSG msg;
    //等待1毫秒，没有等到事件也返回
    while (::WaitForSingleObject(pDlay->delayEvent, 1) == WAIT_TIMEOUT)
    {
        //没有收到事件消息时维持MFC消息正常运行不卡顿
        if (::PeekMessage(&msg, NULL, 0, 0, PM_REMOVE))
        {
            ::TranslateMessage(&msg);
            ::DispatchMessage(&msg);
        }
    }
    CloseHandle(pDlay->delayEvent);
}

原理是sleep时保持原有的消息循环正常运行