B4J is already a mature and powerful product, but working on windows with many objects in the "abstract designer" is complicated. A true wysiwyg like VB6 and others is much simpler.
Regards
Yes, I know, and it helps a lot, but ... the idea was to work directly with only a window and not with abstract objects. To develop only with a laptop it is difficult to have two windows open to see the final aspect. This solution is recommended for those who use 2 monitors (my opinion) .