SelectObject的参数有关问题

SelectObject的参数问题？
void CCh3View::OnLButtonUp(UINT nFlags, CPoint point) 
{  
  CPen pen(PS_SOLID,1,RGB(255,0,0));
CClientDC dc(this);
CPen* pOld = dc.SelectObject(&pen);
dc.MoveTo(m_pOri);
dc.LineTo(point);
SelectObject(pOld);
｝

报错：error C2660: 'SelectObject' : function does not take 1 parameters

[解决办法]
dc.SelectObject(pOld);