vc异或画矩形框并填充颜色 （下来时颜色有白道）下面是我的代码帮忙看下

COLORREF colBack;
   colBack = RGB(100,100,100);
   
   CBrush brush(colBack);
   
   CPen pen(PS_SOLID,0,colBack);
   
   
   CPen* pPen = m_Pdc->SelectObject (&pen);
   
   CBrush* pBrush = m_Pdc->SelectObject (&brush);
   
   int   nOldMode1;
   nOldMode1   =   m_Pdc->SetROP2(R2_NOTXORPEN);
   
  // m_Pdc->Rectangle(1,m_First_Height,rect.Width()-2,m_Move_Height);
   m_Pdc->RoundRect(1,m_First_Height,rect.Width()-2,m_Move_Height,0,0);
   
   m_Move_Height=point.y;
  // m_Pdc->Rectangle(1,m_First_Height,rect.Width()-2,m_Move_Height);
   m_Pdc->RoundRect(1,m_First_Height,rect.Width()-2,m_Move_Height,0,0);
   m_Pdc->SetROP2(nOldMode1);
   
   m_Pdc->SelectObject (pen);
   
   
   
   m_Pdc->SelectObject (pBrush);
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