problems with drawing points in 3d display

how can i draw a specific points in any location i
want in 3d display?
is there a specific method to draw them by giving the
(x,y,z) coordinates? if not,how to extend example 2_03
in the tutorial to draw them in 3d display?

__________________________________________________
Do You Yahoo!?
Talk to your friends online with Yahoo! Messenger.
http://im.yahoo.com