绘制2个图片 如何使重叠的那部分区域有显示呢?

如:

CPen pen1;
    pen1.CreatePen(PS_SOLID,5,RGB(0,107,176));
    pDC->SelectObject(pen1);
    pDC->Ellipse(100,100,200,200);
CPen pen4;
    pen4.CreatePen(PS_SOLID,5,RGB(239,169,13));
    pDC->SelectObject(pen4);
    pDC->Ellipse(155,150,255,250);
    
    初学者 谢谢咯[code=c]
请填写代码
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