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....create and save an appointment: Outlook . AppointmentItem appt = Application...CreateItem ( Outlook . OlItemType . olAppointmentItem ) as Outlook . AppointmentItem...