Class Libraries & REST APIs for the developers to manipulate & process Files from Word, Excel, PowerPoint, Visio, PDF, CAD & several other categories in Web, Desktop or Mobile apps. Develop & deploy on Windows, Linux, MacOS & Android platforms....xls]Sheet1'!A2, '[book1.xls]Sheet1'!A4)" ; //Set..."A2" ]. Formula = "='[book1.xls]Sheet1'!A8" ; //Save the workbook...