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....xlsx" ; //Instantiate a new Workbook...= "=SUM('[book1.xls]Sheet1'!A2, '[book1.xls]Sheet1'!A4)" ; //Set...