Want to know or find OpenGL version in your Computer you can use free app for that called GLview, a OpenGL Extensions Viewer shows basic information about graphics renderer in your Computer.  To know whether your video or graphics card /driver supports particular OpenGL version you should know OpenGL version in your Computer.

OpenGL version

Install and run the GLview, the application shows basic information about your graphics renderer along with OpenGL version,vendor name, renderer name and extensions of the current OpenGL 3D accelerator.

You can also run rendering tests with this tool, your screen may flickr or goes blank  for 15 seconds after completion of rendering tests GLview  shows which OpenGL version running on your Computer.

GLview aka OpenGL Extensions Viewer supports OpenGL 3.0 to 4.1 with rendering tests. You need to have .Net Framework installed in your Computer for GLview to work.

GLView is freeware, supports Windows XP/Vista/7.

Download GLview