Return Value
Return type can be one of the following: A null reference (for a CellTypes.Blank cell type), System.String (for a CellTypes.Label cell type), System.Double (for a CellTypes.Number cell type), or one of the values in the BiffCellBoolErrValues enumeration (for CellTypes.BoolErr cell type). Use the DDCell's Type property to determine the type of the cell before returning the value, or check the type of the returned value.