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.... Value ); //Add the comment with text. rng1 . AddComment...AddComment ( "This is my comment" ); //Save the file. excelApp . ActiveWorkbook...