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....xls" ); xlsx4j - Create New Spreadsheet...dataDir + "newWorksheet_Xlsx4j.xlsx" ; SpreadsheetMLPackage pkg...