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....initialize a Pen object with blue color $pen = new Pen ( $color ->...$graphics -> drawEllipse ( $pen , new Rectangle ( 10 , 10 , 150...