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....2 to 8.6.0 that may be of interest...sheet . Shapes . AddButton ( 2 , 0 , 2 , 0 , 28 , 80 ); button ....