This is an example of how you can use the Xml ActiveX component provided by Chilkat for Free even commercial use.
Works on: Microsoft Windows 7, Vista, XP, 2000, 2003 Server, 2008 Server, and Windows 95/98/NT4. (32 bit / 64 bit)
If you want to see the Documentation, that can be found Here.
Some Examples in Vbscript (That is the closest to AutoIt) can be found Here.
High-level non-validating XML parser component that is free for both commercial an