Line Drawing problem

How do I do the following?
 
A pair of lines is to be moved along with the cursor in a View as in the attached file.
How do I delete the previously drawn lines?
 
 
void CMyView::OnMouseMove(UINT nFlags, CPoint point) 
{
 // TODO: Add your message handler code here and/or call default 
 CClientDC ClientDC (this);
 ClientDC.SetROP2 (R2_NOT); 
 ClientDC.MoveTo (point.x,0); 
 ClientDC.LineTo (point.x,point.y-5); 
 ClientDC.MoveTo (0,point.y); 
 ClientDC.LineTo (point.x-5,point.y);
 
 CView::OnMouseMove(nFlags, point);
 
}
 
 
regards,
-D


		
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