fpSpread1.ActiveSheet.AllowTableCorner = true;
fpSpread1.ActiveSheet.SheetCorner.RowCount = 6;
fpSpread1.ActiveSheet.SheetCorner.ColumnCount = 6;
fpSpread1.ActiveSheet.SheetCorner.AlternatingRows[0].BackColor = Color.Beige;
fpSpread1.ActiveSheet.SheetCorner.Cells[0, 0].Text = "Test";
fpSpread1.ActiveSheet.SheetCorner.Columns[0].Border = new FarPoint.Win.LineBorder(Color.Green);
fpSpread1.ActiveSheet.SheetCorner.Rows[1].Border = new FarPoint.Win.LineBorder(Color.Green);
fpSpread1.ActiveSheet.SheetCorner.HorizontalGridLine = new FarPoint.Win.Spread.GridLine(FarPoint.Win.Spread.GridLineType.None);
fpSpread1.ActiveSheet.SheetCorner.VerticalGridLine = new FarPoint.Win.Spread.GridLine(FarPoint.Win.Spread.GridLineType.None);
fpSpread1.ActiveSheet.SheetCorner.DefaultStyle.VisualStyles = FarPoint.Win.VisualStyles.Off;
MessageBox.Show(fpSpread1.ActiveSheet.SheetCorner.DefaultStyleName);