OpenGL stuff within NIB viewcontroller

Question

Hi, I want to have 3d rotating cubes using openGL within a UIview created using a nib file. How do I do that?

For example, in the ADDMUSIC sample code by apple. I want to have a 3D cube on the view page with message 'your application here'. How do I merge opengl code in the sample code.

Any grandmaster here who can add a tweak of that code? that will be great. please show me the way to do it, i am tired trying and failing.