This article describes how to extend the default calculation engine by implementing a custom calculation engine using the Aspose.Cells library. By loading an existing Excel file or creating a new One, we can use the methods provided by Aspose.Cells to implement a custom calculation engine and get the results. Finally, we save the modified Excel file to disk....capture the TODAY function and add one day to the system date. So if...with custom engine should be one day later than the result without...