//Customize "Cells" in Filter Bar
FarPoint.Win.Spread.SheetView sheetView = fpSpread1.ActiveSheet;
sheetView.AutoFilterMode = FarPoint.Win.Spread.AutoFilterMode.FilterBar;
sheetView.FilterBar.Cells[0].Border = new FarPoint.Win.DoubleLineBorder(Color.Red);
sheetView.FilterBar.Cells[0].BackColor = Color.GreenYellow;
sheetView.FilterBar.Cells[0].CellType = new FarPoint.Win.Spread.CellType.FilterBarCellType();
sheetView.FilterBar.DefaultStyle.Border = new FarPoint.Win.DoubleLineBorder(Color.Yellow);
FarPoint.Win.Spread.CellType.FilterBarCellType cellType = new FarPoint.Win.Spread.CellType.FilterBarCellType();
cellType.ShowDropDownMenuStrip = false;
sheetView.FilterBar.Cells[3].CellType = cellType;
sheetView.FilterBar.Height = 30;
sheetView.FilterBarHeaderStyle.Border = new FarPoint.Win.DoubleLineBorder(Color.Red);
sheetView.FilterBarHeaderStyle.BackColor = Color.Yellow;
fpSpread1.ActiveSheet.Cells[0, 0, 2, 5].Text = "Test";
fpSpread1.ActiveSheet.Cells[3, 0, 5, 5].Text = "A";