How I can get a list with openGl extensions that I am used in my program at runtime in C++. Clarifying, I don't want extensions available in my platform, I don't want extensions I can execute, I want a list of extensions I am using in my code. This is to check if this extensions are availables before start the execution. I am looking GLEW but GLEW is for 


  determining which OpenGL extensions are supported on the target platform.


And what I want is a way to get what extensions I am using. If anyone knows not runtime way please tell me because maybe is useful too.

Also, I want tho know how to determine minimum opengl version to use.


Question: Should a scientific paper have copyright?
Answer: I really do not understand this purpose of your question. Do you want to copy verbatim from someone else? Do you want to forbid other from expanding your work presented in one of your papers? Both these have easy answers. In case 1, do not do it. In case 2, do not publish a paper. Then your idea will be all yours for ever (unless someone else publishes the same idea before you and then you lose). Publishing papers is about sharing results and ideas. Everyone can then expand those ideas as they wish. For protecting novel ideas there are patents and publishing scientific papers is not the way to do it.

You also forget what citation is all about. I can say in my paper a short summary (in my own words) of what you first told in your paper in my related work section if I cite you. I can refer to your results if I cite you. I can compare my results against yours (including those presented in your figures), if I cite you. I can expand your results if I implement your method and improve it significantly, if I cite you. All these are fair uses of your scientific work. If you do not want any of these, do not publish a scientific paper.

UPDATE: The tone of my answer is a bit hostile but two questions on the same day, one basically defending H. Obokata and the other one basically suggesting copyrighting ideas on scientific papers (most probably for profit or fame) shows a complete misunderstanding on how science and scientific publications are supposed to work. In that case, it is better for people (including the OP) to stay as far away as possible from things they do not really understand or "get".