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.... "Test_Workbook.xls" ); //Removing...$workbook -> save ( $dataDir . "Test_Workbook_RemovedProperty.xls"...