Based on code from NetWkstaGetInfo, and retrieves the basic system
information. Note the 'type' field is a little generic as there is
currently no concept of domain controllers, servers or workstation
so I used the most accurate value I could.

We can't just use //tagname; we have to do //*[local-name()='tagname'].

include: Add the ability to initialize oledb constants independently of the INITGUID define by defining DBINITCONSTANTS instead.