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....data into A1 and B1 Cells as headers. sheet . Cells [ 1 , 1 ] =...data into A1 and B1 Cells as headers. sheet . Cells [ 0 , 0 ]. PutValue...