The current value of the cell, which can be:

• A null reference (for a CellTypes.Blank cell type).
• A string (for a CellTypes.Label cell type).
• A double (for a CellTypes.Number cell type).
• One of the values in the BiffCellBoolErrValues enumeration (for a CellTypes.BoolErr cell type).

Use the Type property to determine the cell type before returning the value, or check the type of the returned value.