FarPoint.Win.Spread.CellType.GradientHeaderRenderer gc = new FarPoint.Win.Spread.CellType.GradientHeaderRenderer();
gc.BottomColor = Color.Orange;
gc.TopColor = Color.Red;
gc.Mode = Drawing2D.LinearGradientMode.ForwardDiagonal;
fpSpread1.ActiveSheet.ColumnHeader.Rows[0].Renderer = gc
Dim gc As New FarPoint.Win.Spread.CellType.GradientHeaderRenderer
gc.BottomColor = Color.Orange
gc.TopColor = Color.Red
gc.Mode = Drawing2D.LinearGradientMode.ForwardDiagonal
FpSpread1.ActiveSheet.ColumnHeader.Rows(0).Renderer = gc