The Formula property will be used to calculate a value for the cells in this column.
It is strongly recommended that any column with a formula be marked ReadOnly. A column that is the target of a formula calculation should not be edited by the user, because any user-edited value will be overwritten by the calculated value. Also, if a column is used as both the target and the source of a formula, then the source value will always use the calculated value and not the value displayed in the column after a user edit.
Target Platforms: Windows 10, Windows 8.1, Windows 8, Windows 7, Windows Server 2012, Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2