DuiLib界面库中控件圆角半径有锯齿，怎么使用GDI+改善啊？

Question

void CRenderClip::GenerateRoundClip(HDC hDC, RECT rc, RECT rcItem, int width, int height, CRenderClip& clip)
{
RECT rcClip = { 0 };
::GetClipBox(hDC, &rcClip);
clip.hOldRgn = ::CreateRectRgnIndirect(&rcClip);
clip.hRgn = ::CreateRectRgnIndirect(&rc);
HRGN hRgnItem = ::CreateRoundRectRgn(rcItem.left, rcItem.top, rcItem.right + 1, rcItem.bottom + 1, width, height);
::CombineRgn(clip.hRgn, clip.hRgn, hRgnItem, RGN_AND);
::ExtSelectClipRgn(hDC, clip.hRgn, RGN_AND);
clip.hDC = hDC;
clip.rcItem = rc;
::DeleteObject(hRgnItem);
}
这个函数里应该是用GDI实现的一个圆角半径区域剪裁，怎么用GDI+实现，去除锯齿呢？

Answer 1

dc->SetSmoothingMode(Gdiplus::SmoothingModeHighQuality);
http://blog.csdn.net/pjl1119/article/details/17349049