activeSheet.getCell(0, 0).textDecoration(GcSpread.Sheets.TextDecorationType.Underline);
activeSheet.getRow(1).textDecoration(GcSpread.Sheets.TextDecorationType.Overline | GcSpread.Sheets.TextDecorationType.Underline);
activeSheet.getColumn(1).textDecoration(GcSpread.Sheets.TextDecorationType.Overline | GcSpread.Sheets.TextDecorationType.LineThrough | GcSpread.Sheets.TextDecorationType.Underline);
var style = new GcSpread.Sheets.Style();
style.textDecoration = GcSpread.Sheets.TextDecorationType.Overline | GcSpread.Sheets.TextDecorationType.Underline;
activeSheet.setStyle(1, 1, style, GcSpread.Sheets.SheetArea.viewport);
activeSheet.getCell(0, 0).value("Test");
activeSheet.getCell(1, 0).value("Test");
activeSheet.getCell(0, 1).value("Test");