Centering lines in vi

[Rouben Rostamian]

Does anyone know a combination of commands that will center a given line 
(or better yet, a range of lines) in vi?  

A (perhaps) related question:
Is there a command that returns the current column position of the cursor 
in vi?

-- 
Rouben Rostamian                               Phone: 301 455-2458
Department of Mathematics                      e-mail:
University of Maryland Baltimore Counnty       Rostamian at umbc.bitnet
Baltimore, MD 21228                            rostamia at umbc3.umbc.edu