Most of the code posted by me on this forum is written by me and also my country law supports use of any copyright material which is available publicly for educational purposes.So as long as i am using all these resources for learning ,it is not mandatory to tell the source legally.
Sir,I agree with you regarding being professional but this website is available on all public network across the world that's why i am posting on this forum and according to WIPO Copyright Treaty the exclusive rights are only applicable in the country or region in which a patent has been filed and granted, in accordance with the law of that country or region and it is not possible for a non US resident to know about US laws.
There's still something like intellectual property... In Belgium (and I think in most western countries) you don't have to take a patent (which dosn't even apply here, cause for a patent it has to be new, not obvious and there needs to be an industrial applicability) or copyright something to be it's owner
It's good to be able to use someting, it's better to understand how it works.