How to Protect Microsoft 2003 documents using password?

Sometime we need to protect our Microsoft document like word,powerpoint.  It may have  confidential data.
 ,so we have to protect using password.  In this article will guide you to create the password protected document.

Open the Microsoft document or create New Microsoft document(whatever word,powerpoint...)
Select  the save or save as from File Menu

Now small window will open.
Select your