m_selection.RemoveAll();

    UINT nFlags;

    OnLButtonDown(nFlags,CPoint(0,0));

    OnLButtonUp(nFlags,CPoint(0,0));

}

2．2．2用鼠标移动某一节点时，同步移动与其相连接的箭线

void CSelectTool::OnMouseMove(CDrawView* pView, UINT nFlags, const CPoint& point)

{

    if (pView->GetCapture() != pView)

    {

        …

    CPoint local = point;

    int BackConnect;

    pView->ClientToDoc(local);

    POSITION pos;

    if (c_drawShape == arrow)  

 //判断鼠标移动绘制箭线过程中是否与某一节点相连

//此时函数是CRectTool::OnMouseMove（）调用selectTool.OnMouseMove();而跳到这里

    {

        CRect circlerect;

        CDrawNode* pForeCircle;

        CDrawNode* pBackCircle;

        pos=pView->GetDocument()->m_objects.GetHeadPosition();

        if(pos!=NULL)

        {

            int i=0;

            int num=pView->GetDocument()->m_objects.GetCount();

            while(i<num)

            {

                CDrawNode* pDrawCircle=(CDrawNode*)pView->GetDocument()->m_objects.GetNext(pos);

                if(pDrawCircle!=NULL)

                {