一个“鼠标重复”功能

只要

1. 鼠标按钮按下，并且
2. 鼠标指针保持在myRect范围内，就会执行DoClickThing()（你可以选择任何在WM_LBUTTONDOWN消息上调用的函数）。

你需要在你的CWnd派生类中重写OnLButtonDown、OnMouseMove、OnLButtonUp和OnTimer函数。重复速率设置为模拟键盘重复行为。

感谢Christian Sloper提供的想法。

void CTestCtrl::OnLButtonDown(UINT nFlags, CPoint point)
{
    if(PtInRect(&myRect, point))
    {
        DoClickThing();
        SetCapture();

        // initial timer interval = keyboard repeat delay
        int setting = 0;
        SystemParametersInfo(SPI_GETKEYBOARDDELAY, 0, &setting, 0);
        int interval = (setting + 1) * 250;
        TimerID = SetTimer(99, interval, NULL);
        TimerStep = 1;
    }
}

void CTestCtrl::OnMouseMove(UINT nFlags, CPoint point)
{
    if(TimerStep && !PtInRect(&myRect, point))
    {
        KillTimer(TimerID);
        ReleaseCapture();
        TimerStep = 0;
    }
}

void CTestCtrl::OnLButtonUp(UINT nFlags, CPoint point)
{
    if(TimerStep)
    {
        KillTimer(TimerID);
        ReleaseCapture();
        TimerStep = 0;
    }
}

void CTestCtrl::OnTimer(UINT nIDEvent)
{
    if(TimerStep == 1)
    {
        KillTimer(TimerID);

        // set timer interval per keyboard repeat rate
        DWORD setting = 0;
        SystemParametersInfo(SPI_GETKEYBOARDSPEED, 0, &setting, 0);
        int interval = 400 - (setting * 12);
        TimerID = SetTimer(100, interval, NULL);
        TimerStep = 2;
    }

    if(TimerStep)
        DoClickThing();
}