I used this documentation to add footer information to all web pages on a specific site. 

http://www.microsoft.com/technet/prodtechnol/WindowsServer2003/Library/IIS/e27f918e-89a9-45a8-8604-2ad2ded09d64.mspx?mfr=true

However, it only applies to HTML files.  How can I get the footer to be included on ASPX pages too?

Master page.  :)

IIS doesn't parse outgoing code, it simply adds static content at the end of the page, so it can't know where an ASPX page ends.  So IIS footers only work with static files.

Jeff

That's not the answer I was hoping for.  Thanks.

hismightiness:

That's not the answer I was hoping for. 

IIS 7 has some possibilities to change this, sincs all requests are processed through an integrated pipeline.  Check www.iis.net for help on that.  But prior versions you're stuck with either an ASP.NET solution or witing your own ISAPI filter.

Jeff