void CTripleLinkageOpt::OnLButtonDown(const CPoint& point)
{
    int nRet  = GetFocusThumb(point);

    if(nRet != -1) // begin to drag?
    {
        m_nFocusThumb = nRet;

        if( m_nFocusThumb == FOCUS_ON_TOPLEFT || m_nFocusThumb == FOCUS_ON_RIGHTBTM) //single button模式 两个从属的不能拖动
        {
            return;
        }
        m_bStartDraging = TRUE;
        //HWND hwnd = SetCapture(AfxGetApp()->GetMainWnd()->);
    }
    else
    {

        if( m_nFocusThumb == FOCUS_ON_TOPLEFT || m_nFocusThumb == FOCUS_ON_RIGHTBTM) //single button模式 两个从属的不能拖动
        {
            return;
        }
        MovePage(point);

        ReCalcChannelRect();
    }
}
void CMultiThumbOpt::OnLButtonDown(const CPoint& point)
{
	int nRet  = GetFocusThumb(point);

	if(nRet != -1) // begin to drag?
	{	
		m_nFocusThumb = nRet;
		
		m_bStartDraging = TRUE;
		//HWND hwnd = SetCapture(AfxGetApp()->GetMainWnd()->);
	}
	else
	{
		MovePage(point);
		ReCalcChannelRect();
	}
}