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....()); $worksheets = $ptr -> Get ( $workbook , "Worksheets" , array...array ()); $worksheet_index = $ptr -> Call ( $worksheets , "Add_2"...