MFC使用TRACKMOUSEEVENT触发mouseHover和mouseLeave

void CmfcDlgDlg::OnMouseMove(UINT nFlags, CPoint point)
{
    // TODO: 在此添加消息处理程序代码和/或调用默认值
    //GetDlgItem(IDC_BUTTON)->SetWindowText("Move");

    if (!m_bTracking)
    {
        TRACKMOUSEEVENT tme;
        tme.cbSize = sizeof(TRACKMOUSEEVENT);
        tme.dwFlags = TME_LEAVE | TME_HOVER;//要触发的消息
        tme.hwndTrack = this->m_hWnd;
        tme.dwHoverTime = 10;// 若不设此参数，则无法触发mouseHover

        if (::_TrackMouseEvent(&tme)) //MOUSELEAVE|MOUSEHOVER消息由此函数触发
        {
            m_bTracking = true;   
        }
    }

    CDialogEx::OnMouseMove(nFlags, point);
}


void CmfcDlgDlg::OnMouseHover(UINT nFlags, CPoint point)
{
    // TODO: 在此添加消息处理程序代码和/或调用默认值
    GetDlgItem(IDC_BUTTON)->SetWindowText("Hover");
    m_bTracking = false;
    CDialogEx::OnMouseHover(nFlags, point);
}


void CmfcDlgDlg::OnMouseLeave()
{
    // TODO: 在此添加消息处理程序代码和/或调用默认值
    GetDlgItem(IDC_BUTTON)->SetWindowText("Leave");
    m_bTracking = false;
    CDialogEx::OnMouseLeave();
}