To delete one or more objects from the form, select them either on the Design Canvas or in the Outline view and press Delete. Alternatively, right-click and select Delete from the context menu.
When a control is deleted from the Design Canvas:
If it is a container control, any child controls that it contains are also deleted.
All event-handling code related to a deleted control is removed from the class file, provided it is not used by any other control.
The Undo option is available to reverse a deletion if necessary.
When you delete a control with the Visual Designer, the assembly reference is not automatically removed from the assemblies.xml file or from the Project Explorer view. Although unused assembly references do no harm, if you want to delete them, you must do so manually. You can use the Assemblies dialog in project properties (Project > Properties > Progress OpenEdge > Assemblies). Directly editing the assemblies.xml file is not recommended.
Note: You cannot delete the visual container object (the form itself).
If it is a container control, any child controls that it contains are also deleted.