[Typo3-windows] How to share TYPO3 code

[Odilon Cenamo]

Hi,

I'm new user and finally I could install a operacional release in my 
desktop Windows XP SP2. The only version that works fine is the WAMP 
Quickstart.

Now, I would like to make a new site.

The question is: How can I use and share the TYPO3 code between some 
sites ? Is possible to use only one database or I must to use one 
database for each site ?

Is not very clean to me yet how to do this.

Can someone help me, please?

I'm sorry about this so basic question !!

Thank you,

Odilon Cenamo