var instance = new GC.Spread.Sheets.Style(backColor,
                                         foreColor,
                                         hAlign,
                                         vAlign,
                                         font,
                                         themeFont,
                                         formatter,
                                         borderLeft,
                                         borderTop,
                                         borderRight,
                                         borderBottom,
                                         diagonalDown,
                                         diagonalUp,
                                         locked,
                                         textIndent,
                                         wordWrap,
                                         shrinkToFit,
                                         backgroundImage,
                                         cellType,
                                         backgroundImageLayout,
                                         tabStop,
                                         textDecoration,
                                         imeMode,
                                         name,
                                         parentName,
                                         watermark,
                                         cellPadding,
                                         labelOptions);
var value; // Type: string
value = instance.themeFont;