how to hide application

Hi All,

I need to know how to hide an application from the

A. Windows task manager (Under NT and NON-NT based Windows).

B. Windows Process List (IF POSSIBLE) under NT based Windows.

So can someone please provide me with any sample code that can help me
accomplish my above tasks?

P.S. About task (B) I know that it was done before using C++ but I am not
sure if it is possible to be done using Delphi.

Thanks in advance for your help

Regards