How to: Programmatically Run Excel Calculations Programmatically
You use a similar process to run calculations in a NamedRange control or a native Excel range object.
Applies to: The information in this topic applies to document-level projects and application-level projects for Excel 2013 and Excel 2010. For more information, see Features Available by Office Application and Project Type.
The following example creates a NamedRange at cell A1 and then calculates the cell. This code must be placed in a sheet class, not in the ThisWorkbook class.