Plus controls are created using the Rumba+ Screen Designer by adding controls to captured screen and selecting relevant properties, see below.
Another way to create Plus controls is to use code.
You can use the Rumba+ VBA API to create and access Plus controls, and modify their properties. In addition, events are fired for each Plus control. In this way, you can create more complex and better responsive modern applications by using custom capabilities that are not currently available in the Screen Designer. Validating user input can be performed on specific Rumba+ screens as declared by the user.
This functionality can be an extension for Plus sessions whether or not a Plus archive (.rdar file) is associated with the session. Plus mode must be enabled to support this.