Before apply, please make sure you have strong knowledge or RealBasic/Xojo.
IDE should have dockable sidebar, log bar, menu bar with basic functionality like file operations, editing.
Code editor component/tab must have syntax highlighting (if you can handle some intellisense, would be a plus).
Tab operations, like Close All, check if code was modified before closing and offer to save changes.
To confirm that you understand the idea, please provide a screenshot of basic layout and brief information about you and your skills.