Hiding an application

From: Anthony Hosking (mrmclarge_at_yahoo.co.uk)
Date: 05/24/04 

Date: Mon, 24 May 2004 17:07:17 +1200

is it possible to hide an application, so that is does not show up in
the task manager, so that it can not be shut doen that way, I am
working on a system to control the time children are on the computer

Many thanks