creating a file within a subdir in DOS batch file   

I need a refresher on how to create a file inside a .bat file in DOS.

I can md for 1 dir and sub dir, but how do I create a .txt, .doc, .ppt, .xls 
and/or .bat file within the sub?

thanks,
LM

date: Thu, 20 Sep 2007 06:28:04 -0700   author:   matlyn