i need to know the basics (or more, if possible) but first, wich files i need for the OpenGL library (or whatever its the name)
please help me !! 
To compile, you need at least two files, gl.h and opengl32.lib. You may need glu.h and glu32.lib aswell. These files can be downloaded in the download section at the OpenGL site.
These files are generally included in the major compiler packages.
And I suggest you visit NeHe’s tuorials on OpenGL, the best you can find. Also some tutorials on how to get OpenGL to work.