User Interface Development in OpenEdge refers to designing and building interactive screens for business applications using Progress 4GL (ABL) and OpenEdge tools. It focuses on creating forms, menus, dashboards, and input screens that allow users to interact with enterprise data efficiently. Developers use OpenEdge GUI technologies such as Progress ABL GUI, .NET UI integration, or web-based interfaces to build responsive applications. The process includes event handling, data binding, validation, and layout design to improve usability. User Interface Development in OpenEdge helps deliver intuitive, efficient, and user-friendly enterprise applications across industries like finance, manufacturing, and logistics.