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....the PPTX file to the Disk pres . Write ( "EmptySlide.pptx" );...( "Slides Test Presentation.pptx" ); //Accessing a slide using...