Could you give us a better idea of what you're trying to accomplish? Also,
which version of PPT are you using?
Basically, to draw a "bar," you'd use a rectangle autoshape, then give it an
appropriate fill so it looks "3D-ish." Or you can apply 3D settings using
the 3D Style button on the Drawing toolbar. You'd probably need to tweak the
3D settings using the 3D Settings toolbar, as the default options are pretty
extreme.
Somehow I think that's not what you're asking, though.