This article describes how to create a custom function in Microsoft Excel using the ICustomFunction feature in the Aspose.Cells library. By loading an existing Excel file or creating a new Excel file, we can use the methods provided by Aspose.Cells to define and register custom functions and get the results. Finally, we save the modified Excel file to disk....interface allows to add custom formula calculation functions to extend...reference corresponding with the formula’s position, you can use ReferredArea...