FarPoint.Win.Spread.CellType.ButtonCellType bttncell = new FarPoint.Win.Spread.CellType.ButtonCellType();
bttncell.ButtonColor = Color.Cyan;
bttncell.DarkColor = Color.DarkCyan;
bttncell.LightColor = Color.AliceBlue;
bttncell.ShadowSize = 3;
bttncell.Text = "Click and hold...";
bttncell.TextDown = "...you can see how words go to multiple lines. Now let go.";
bttncell.TextColor = Color.Green;
bttncell.WordWrap = true;
bttncell.UseVisualStyleBackColor = false;
fpSpread1.Sheets[0].Cells[3,2].CellType = bttncell;