How to I get access to a MSXML2.FreeThreadedDOMDocument60 document in
a Microsoft Visual C# 2005 dot net project?

I'm writing a dot net executable that needs to access a by ref XML dom
from a Visual Basic 6 dll. The dll returns XML but I'm not sure how to
type the XML object.

// Dot NET Class
vb6Project.myClass vb6DataObject = new vb6Project.myClass();
MSXML2.IXMLDOMDocument2 _testxml = new MSXML2.IXMLDocument2();
vb6DataObject.GetData(ref _theXml);

// VB 6 Class
Private Function iTheProject_GetData(ByRef theXml As
MSXML2.FreeThreadedDOMDocument60) As Boolean
   set theXml = getXMLDoc()
end function

With all the things I've tried, I get one of two errors:

Error 1 Cannot create an instance of the abstract class or interface
'MSXML2.IXMLDOMDocument2'

or

cannot convert from '[ref MSXML2.FreeThreadedDOMDocument]' to 'ref
MSXML2.IXMLDOMDocument2'

Maybe there's a lot more to it then just passing in the correct
object? Any help and/or code examples will be greatly appreciated.

-- i