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....( 0 ); # Put some data into header rows (A1:A4) $i = 0 ; while...get ( $i , 0 ) -> setValue ( "Header Row # $i " ); $i ++ ; } # Put...