gcSpreadSheet1.SheetCount = 3;
gcSpreadSheet1.StartSheetIndex = 0;
gcSpreadSheet1.Sheets[0].SheetTabColor = Windows.UI.Colors.Magenta;
gcSpreadSheet1.Sheets[1].SheetTabThemeColor = "Accent 6 40";
GcSpreadSheet1.SheetCount = 3
GcSpreadSheet1.StartSheetIndex = 0
GcSpreadSheet1.Sheets(0).SheetTabColor = Windows.UI.Colors.Magenta
GcSpreadSheet1.Sheets(1).SheetTabThemeColor = "Accent 6 40"