Thank you for your response.
I'm thinking to buy unigui very soon but i should be sur that this framework is what i need (I'm just starting, a beginner developer i don't have enought ressources to spent it on trying frameworks)
I saw some demo projetcs, some running applications, it looks great that is why i am asking how to do something like that (stable + Powerful and effective) so my question is : do i need really just "unigui" nothing else ?