线冒Cap

void CGdi1View::OnDraw(CDC* pDC)
{
 CGdi1Doc* pDoc = GetDocument();
 ASSERT_VALID(pDoc);
 Graphics graphics(pDC->m_hDC);
    Pen newpen(Color(255,0,0),3);
 newpen.SetWidth(10);
 newpen.SetStartCap(LineCapRound);//起点线冒
 newpen.SetEndCap(LineCapRound);//终点线冒
 graphics.DrawLine(&newpen,20,10,200,100);
 // TODO: add draw code for native data here
}