PHP DOCUMENT_ROOT environment variable.

I believe that I can set DOCUMENT_ROOT environment variable at php.ini.

I know I should put the web root directory in it, but how should I write it?

I use winNT and my web root is
C:\www\mysite\
well this doesn't seem right.

I have a free web account and when I write out the DOCUMENT_ROOT environment var it writes out:
home/www/username/

it's not something that start with drive letter! How should I write it correctly?

I use winNT and my web root is
C:\www\mysite\
well this doesn't seem right.

I have a free web account and when I write out the DOCUMENT_ROOT environment var it writes out:
home/www/username/

I think this is because the "free acount" runs Unix (Or simler), and in Unix they don't use drive letters...

At least this is what I think.

(Maybe some typos/Or something wrong written)