Missing DOMDocument Library

This says I need to have MSXML 4.0 and not MSXML installed:

http://groups.google.com/group/microsoft.public.vb.6.webdevelopment/msg/53f63a11bdf8d189?hl=en

This is the download link for MSXML 4.0:

http://www.microsoft.com/downloads/details.aspx?FamilyID=3144b72b-b4f2-46da-b4b6-c5d7485f2b42&DisplayLang=en

Debugging VB6 Code

I have some VB 6 code that is called by a .NET application.

How do I debug?

How do I get a window to pop up or print to the command line?