fpSpread1.ActiveSheet.Rows.Count = 11;
fpSpread1.ActiveSheet.Columns.Count = 6;
fpSpread1.InterfaceRenderer = null;
fpSpread1.ActiveSheet.RangeGroupBackgroundColor = Color.LightGreen;
fpSpread1.ActiveSheet.RangeGroupButtonStyle = FarPoint.Win.Spread.RangeGroupButtonStyle.Enhanced;
fpSpread1.ActiveSheet.AddRangeGroup(0, 8, true);
fpSpread1.ActiveSheet.AddRangeGroup(0, 5, true);
fpSpread1.ActiveSheet.AddRangeGroup(1, 3, false);
fpSpread1.ActiveSheet.AddRangeGroup(1, 2, false);
private void button1_Click(object sender, EventArgs e)
{
FarPoint.Win.Spread.SpreadView sv;
sv = fpSpread1.GetRootWorkbook();
listBox1.Items.Add(sv.GetColumnRangeGroupHeight());
}