FarPoint.Web.Spread.Model.INamedStyleSupport ins;
FarPoint.Web.Spread.NamedStyleCollection nsc = new FarPoint.Web.Spread.NamedStyleCollection();
FarPoint.Web.Spread.NamedStyle ns1 = new FarPoint.Web.Spread.NamedStyle("StyleHeaders", "HeaderDefault");
FarPoint.Web.Spread.NamedStyle ns2 = new FarPoint.Web.Spread.NamedStyle("StyleData", "DataAreaDefault");
ns1.BackColor = Color.Yellow;
ns2.BackColor = Color.LightBlue;
FpSpread1.NamedStyles.Add(ns1);
FpSpread1.NamedStyles.Add(ns2);
ins = (FarPoint.Web.Spread.Model.INamedStyleSupport)FpSpread1.ActiveSheetView.StyleModel;
ins.SetDirectAltRowName(0, "StyleHeaders");
ins.SetDirectName(1, 1, "StyleData");
nsc = ins.NamedStyles;