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....dataSheetIdx ) { Worksheet work = workbook . Worksheets [ dataSheetIdx...workbookDesigner . Workbook . Worksheets . ActiveSheetIndex = dataSheetIdx...