How to make a sitemap, so that every time i add a page to my website it automatically get encrypted with the older sitemap ?
if you have a custom website you have to code this. i would assume you have to have some sort of database to work with this. for blog software like wordpress its an automated process.
I would recommend building your own as long as you are not running an extremely large website, also have you thought of using some of the open source software on the internet to do this?