鼠标的动作

LRESULT OnLButtonDown(UINT Flags, CPoint pt)
{
    HRESULT    hr;
    INPUT    input;

    if(!m_bConnected)
        return 0;

    m_bLeftBtn           = true;
    input.type           = INPUT_MOUSE;
    input.mi.dwFlags     = MOUSEEVENTF_ABSOLUTE | 
                           MOUSEEVENTF_LEFTDOWN;
    input.mi.dx          = pt.x * 65536 / m_xDevScr;
    input.mi.dy          = pt.y * 65536 / m_yDevScr;
    input.mi.mouseData   = 0;
    input.mi.time        = 0;
    input.mi.dwExtraInfo = 0;

    hr = Write(RCM_SETINPUT);
    if(SUCCEEDED(hr))
    {
        hr = Write(&input, sizeof(input));
        if(SUCCEEDED(hr))
            hr = GetScreen();
    }

    return 0;
}