how to upgrade openGL in visual studio?

I tried to set up glew and then devIL/openIL in visual studio but still have runtime and link error . I wa开发者_开发知识库nt to know it can be from openGL version of my visual studio or what? what should i do for upgrading my openGL?

Thanks.

error LNK2019: unresolved external symbol __imp__ilInit@0 referenced in function _main

You're calling but not defining ilInit(). Try linking against DeviL.lib.

OpenGL library can't be upgraded. GLew should do the work to dynamically retrieve new functions pointers. Are you sure you are linking against opengl32.lib ?