The Java™ Step Processor UI Toolkit parameters are system fields, which are defined in the IVWPanelComponent interface.
Only the system fields that are defined in IVWPanelComponent are used by the Content Platform Engine. In addition to these system fields, you can add other system fields to your customized Java Step Processor and Launch Step Processors, .
All Java Step Processor UI Toolkit beans (controls) that can be contained by VWPanel must implement IVWPanelComponent. IVWPanelComponent provides support for creating user-defined fields for the VWCheckBox, VWLabel, VWTextArea, and VWTextField controls.
For more information, see Java Step Processor UI Toolkit beans.