FpSpread1.Columns.Count = 4;
FpSpread1.Columns[0].BackColor = Color.Yellow;
FpSpread1.Columns[1, 2].BackColor = Color.YellowGreen;
TextBox1.Text = Convert.ToString(FpSpread1.Columns.Default);
TextBox2.Text = Convert.ToString(FpSpread1.Columns.Parent);
FpSpread1.Columns.Count = 4
FpSpread1.Columns.Item(0).BackColor = Color.Yellow
FpSpread1.Columns(1, 2).BackColor = Color.YellowGreen
TextBox1.Text = Convert.ToString(FpSpread1.Columns.Default)
TextBox2.Text = Convert.ToString(FpSpread1.Columns.Parent)