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void CDrawViw::OnMouseMove(UINT nFlags,CPoint point)
{
CClientDC dc(this);
CPen pen(PS_SOLID,1,RGB(255,0,0));
CPen *pOldPen=dc.SelectObject(&pen);
if(m_bDraw==TRUE)
{
dc.MoveTo(m_ptOrigin);
dc.LineTo(m_ptOld);
dc.MoveTo(m_ptOrigin);
dc.LineTo(point);
m_ptOld=point;
}
dc.SelectObject(pOldPen);
CView:OnMouseMove(nFlags,point);
}