Returns or sets the object's formula, in A1-style notation and in the language of the macro. Read/write Variant for Range objects, read/write String for all other objects.
Remarks
This property is not available for OLAP data sources.
If the cell contains a constant, this property returns the constant. If the cell is empty, Formula returns an empty string. If the cell contains a formula, Formula returns the formula as a string, in the same format in which it would be displayed in the formula bar (including the equal sign).
If you set the value or formula of a cell to a date, Microsoft Excel checks to see whether that cell is already formatted with one of the date or time number formats. If not, Microsoft Excel changes the number format to the default short date number format.
If the range is a one- or two-dimensional range, you can set the formula to a Visual Basic array of the same dimensions. Similarly, you can put the formula into a Visual Basic array.
Setting the formula for a multiple-cell range fills all cells in the range with the formula.