次のサンプルコードは、ColumnSplitBoxPolicyプロパティを設定します。
FarPoint.Win.Spread.SpreadView sv = fpSpread1.GetRootWorkbook();
sv.ColumnSplitBoxPolicy = FarPoint.Win.Spread.SplitBoxPolicy.Never;
Dim sv As FarPoint.Win.Spread.SpreadView = FpSpread1.GetRootWorkbook
sv.ColumnSplitBoxPolicy = FarPoint.Win.Spread.SplitBoxPolicy.Never