You have seen that, unlike visual development tools, the starting point for an CA Plex application design is a design model, not screen layouts. This is because design and modeling are the keys to building large-scale applications successfully. However, just like a visual programming tool, CA Plex provides an easy-to-use editor for designing graphical user interfaces (GUIs). It includes a rich set of native GUI controls plus the ability to use third-party components (ActiveX controls in Windows C++ and JavaBeans in Java). There is another mode of editor that enables the character-based screens of a System i 5250 application to be designed in the same way.
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