Application.Volatile method (Excel)
Marks a user-defined function as volatile. A volatile function must be recalculated whenever calculation occurs in any cells on the worksheet. A nonvolatile function is recalculated only when the input variables change. This method has no effect if it's not inside a user-defined function used to calculate a worksheet cell.
expression A variable that represents an Application object.
|Volatile||Optional||Variant||True to mark the function as volatile. False to mark the function as nonvolatile. The default value is True.|
This example marks the user-defined function My_Func as volatile. The function will be recalculated when any cell in any workbook in the application window changes value. Recalculation of the function is not restricted to changes or calculation cycles on the worksheet for which this function applies. Therefore, use it moderately to avoid calculation lag.
Function My_Func() Application.Volatile ' ' Remainder of the function ' End Function
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