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....PutValue ( 10 ); //Add Sum formula in cell D4 but customize it...( style ); //The result of formula will be 20 //but 20 will not...