Find Intranet Web Sites On The Network

I am writing a program to scan the local network looking for Intranet web sites. If I find that port 80 is open, (I'm using the winsock control for this), then I know that there may be a site on this machine.

My problem is how do I find all the sites on the machine, using VB.

I can use FrontPage to find the names for the sites developed with IIS or PWS. But I would like to be able to automate the whole process and get VB to tell me what sites are on each machine, whether IIS,PWS,Netscape® Enterprise Server, etc.

Can any one please help me?

Thanks in advance,

DesOB