I co-wrote this book on VB6 & XML. When Wrox went bankrupt their assets were divvied up; this book ended up with Apress , who have not bothered to keep it in print.
Go mock my goofy cover photo: http://www.amazon.com/Professional-Visual-Basic-6-XML/dp/1861003323
(In this pic I’m the guy on the right; the actual book cover has my photo on the left.)
You can download the source code for the book here