How can I get access to readyState 3 with VBA "AJAX"?

I'm writing some VBA code (in Excel) which uses a reference to Microsoft XML, v6.0, and creates a MSXML2.XMLHTTP object. I used the clsXMLHttpMonitor example from this page as a starting-off point. How can I access the response text when readyState = 3? [more inside]
posted by jozxyqk on Jan 8, 2013 - 10 answers