FarPoint.Win.Spread.CellType.ButtonCellType btn = new
FarPoint.Win.Spread.CellType.ButtonCellType();
btn.BackgroundStyle = FarPoint.Win.BackStyle.Gradient;
btn.ButtonColor = Color.Yellow;
btn.ButtonColor2 = Color.Orange;
btn.GradientMode = System.Drawing.Drawing2D.LinearGradientMode.ForwardDiagonal;
btn.UseVisualStyleBackColor = false;
fpSpread1.ActiveSheet.Cells[0, 0].CellType = btn;
Dim btn As New FarPoint.Win.Spread.CellType.ButtonCellType
btn.BackgroundStyle = FarPoint.Win.BackStyle.Gradient
btn.ButtonColor = Color.Yellow
btn.ButtonColor2 = Color.Orange
btn.GradientMode = System.Drawing2D.LinearGradientMode.ForwardDiagonal
btn.UseVisualStyleBackColor = False
FpSpread1.ActiveSheet.Cells(0, 0).CellType = btn