FontFamily fontFamily(szFaceName/*(WCHAR*)strFaceName.GetBuffer()*/);  Font font(&fontFamily, (REAL)m_txLogFont.lfHeight, FontStyleRegular, UnitPixel);  // 文本  UINT ascent;  REAL ascentPixel;  UINT descent;  REAL descentPixel;  UINT lineSpacing;  REAL lineSpacingPixel;  // 获取 字体上部距离  ascent = fontFamily.GetCellAscent(FontStyleRegular);  // 转换为像素单位  ascentPixel = font.GetSize()*ascent/fontFamily.GetEmHeight(FontStyleRegular);  // 获取字体下部距离  descent = fontFamily.GetCellDescent(FontStyleRegular);  // 转换为像素单位  descentPixel = font.GetSize()*descent/fontFamily.GetEmHeight(FontStyleRegular);  // 获取字体行距  lineSpacing = fontFamily.GetLineSpacing(FontStyleRegular);  // 转换为像素单位  lineSpacingPixel = font.GetSize()*lineSpacing/fontFamily.GetEmHeight(FontStyleRegular);  // 计算输出文本间行距  REAL rSpaceLine = lineSpacingPixel - ascentPixel - descentPixel;

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