How to determine the opengl version under windows?

Question

I knew Windows comes with Opengl drivers. If I also have NVidia driver, how to termine the OpenGL version?

Answer 1

I knew Windows comes with Opengl drivers.

Actually it doesn't. Windows comes with a OpenGL emulation. But actual OpenGL drivers are only available through the vendor original drivers.

how to termine the OpenGL version?

Create a OpenGL context and use the glGetString function to retrieve the identifying values. Of most interest are GL_VERSION and GL_RENDERER.

Answer 2

You can use glGetString(GL_VERSION) to retrieve the currently executing OpenGL Version.