MFC Gdiplus::Font 如何让字体变细变淡

FontFamily fontFamily(L"Century Gothic");
Gdiplus::Font font(&fontFamily, 10, FontStyleRegular, UnitPoint);
SolidBrush linGrBrush(Color(100,0,0,0));
graphics.DrawString(wcstring, (INT)wcslen(wcstring), &font, pointF, &linGrBrush);
这样来写。发现出来的字体很黑，而且尺寸小的话比较模糊。如何让字体显示的淡一点不要是黑体加粗那种。而且清楚一点。谢谢