Have a look at this: http://users.rcn.com/mba.dnai/software/opengl/reflect/

I take a look at the source to see how it is done. Hope it is not to hard to read in c++.

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Do you mean the reflections on the ball? If yes, then that shouldn't be that hard. It's just a reflectioncubemap, and those kind of reflections are easy to create since OpenGL supports cube mapping.
Just render the scene from the position of the reflective object six times (view to the left, the right, the top, the bottom, front and back) and copy them to the cube map's faces, but don't forget to NOT draw the reflective object when rendering it's cubemap faces. Need for Speed : Underground for example uses this technique for the car's reflection, but the game doesn't update them every frame, cause that would consume to much processing time. So regenerating the reflective cubemap alle 4 or even more frames should be more than enough.

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