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....MapiMessage msg = MapiMessage . fromFile ( dataDir + "message.msg" );...FollowUpManager . addCategory ( msg , "Purple Category" ); // Add...