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....//Instantiate a new Workbook. Workbook workbook = new Workbook (); //Get...Worksheet Worksheet sheet = workbook . Worksheets [ 0 ]; //Get...