Bandbox does not allow to distinguish onOK from onCancel

When the badbox is opened I can close it by:

• mouse click outside the bandpopup
• pressing Enter
• pressing Escape

All three result in onOpen event being dispatched. I would like to be able to distinguish the sources of closing the bandbox.

In my case in the bandpopup I have a listbox in which I allow keyboard selection. On Enter I want to pass the selection further while on Escape I want to simply close the popup and clear the selection.

I set the priority to Critical while I see no reasonable workaround. I plan to update to latest 7.0.x version so it's enough for me to get this fixed in the latest branch.