1. I have created a custom QToolBox widget by simply adding 3 more tab pages to the default QToolBox designer and named my class ToolBox.
2. In my main form, I added a QToolBox widget, right click on the QToolBox widget, and selected promote to.
3. I entered in ToolBox as my promoted object and clicked on promote. However, the mainform ui still only contain only the default QToolBox pages eventhough the side of the control, on the object viewer, indicates that it is a ToolBox derived object.

Can someone show me how I can promote a QToolBox widget? Thanks!