How to ues opengl in fortran ?? thanks!!!

I am a beginner with OpenGL, I have download f90gl Software from, and found a Fortran90 project in the example catalogue. I opened the example file with Compaq Visual Fortran 6.0. when I compiled, there were many wrong as follows:

Could not find the file opengl_gl.mod.
Could not find the file opengl_glu.mod.
Could not find the file opengl_glut.mod.

I have added many .dll and .h files in many different catalogues, such as c:\windows\system, but I can solve this problem. What should I do??? Where can I find these(opengl_glut.mod) module??? Thanks!!!