Help with cubemaps

Could someone please explain to me how to make a simple cubemap to show a reflective surface on the top of a cube... or point me to a tutorial, for some reason I am just not getting it. Thx!

Cygnus has an excellent demo in the code archives.

http://www.blitzbasic.com/codearcs/codearcs.php?code=1167

Did you try this:
http://www.blitzbasic.com/codearcs/codearcs.php?code=1167

Also, try to find the markio cubed demo. And Robs Water Demo. And the cubemap water demo that was released lately (skybox etc.).

Ah yes, thanx much!

I added a bit to the code archive entry for this to get the multitexturing to work properly...