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....book = new Workbook (); // Access first worksheet from the collection...0 , 4 , 0 , 100 , 30 ); // Access the ActiveX Control object...