Changing the ROOT_DIRECTORY

Hi all,

I am using XAMPP (latest version) I have got MySQL, PHP, Apache etc..

I wanted to change the root directory shown in PHPINFO(); for XAMPP for my
localhost://

Is there an easy way to do this? i am a complete novice and first timer and
I assume that if I change it to 'C:\web' my php files (in that directory
will be shown)

Please help...

Thanks
Andy Mak