次のサンプルコードは、1番目のシートの値を合計して2番目のシートにその値を格納します。
fpSpread1.EnableCrossSheetReference = true;
fpSpread1.Sheets.Count = 2;
fpSpread1.Sheets[0].Cells[0, 0, 50, 50].CellType = new FarPoint.Win.Spread.CellType.NumberCellType();
fpSpread1.ActiveSheet.Cells[0, 0].Value = 100;
fpSpread1.ActiveSheet.Cells[1, 0].Value = 100;
fpSpread1.Sheets(1).Cells[0, 0, 50, 50].CellType = new FarPoint.Win.Spread.CellType.NumberCellType();
fpSpread1.Sheets(1).Cells[1, 3].Formula = "Sheet1!A1+Sheet1!A2";
FpSpread1.EnableCrossSheetReference = True
FpSpread1.Sheets.Count = 2
FpSpread1.Sheets(0).Cells(0, 0, 50, 50).CellType = New FarPoint.Win.Spread.CellType.NumberCellType
FpSpread1.ActiveSheet.Cells(0, 0).Value = 100
FpSpread1.ActiveSheet.Cells(1, 0).Value = 100
FpSpread1.Sheets(1).Cells(0, 0, 50, 50).CellType = New FarPoint.Win.Spread.CellType.NumberCellType
FpSpread1.Sheets(1).Cells(1, 3).Formula = "Sheet1!A1+Sheet1!A2"