GrapeCity.Win.Spread.InputMan.CellType.GcComboBoxCellType gccombo = new GrapeCity.Win.Spread.InputMan.CellType.GcComboBoxCellType();
gccombo.Items.AddRange(new string[] { "Feta", "Havarti", "Swiss" });
gccombo.Items[0].BackColor = Color.Beige;
gccombo.Items[1].BackColor = Color.Cornsilk;
gccombo.Items[2].BackColor = Color.PeachPuff;
gccombo.EditorValue = GrapeCity.Win.Spread.InputMan.CellType.GcComboBoxEditorValue.Index;
fpSpread1.Sheets[0].Cells[1, 1].CellType = gccombo;
fpSpread1.Sheets[0].Columns[1].Width = 200;
fpSpread1.Sheets[0].Rows[1].Height = 40;
private void button1_Click(object sender, EventArgs e)
{
textBox1.Text = fpSpread1.Sheets[0].Cells[1, 1].Value.ToString();
}