Sample for C++ schema validation using MSXML 4

[Marcinkovics Tamas <marci@csoma.elte.hu>]

I would like to use the MSXML 4.0 C++ tool for schema validation;
but there's only a VB source in the online help, and I'm not a COM expert,
I cannot figure it out. When I'm using the C++ samples from the MSXML
4.0 Parser SDK help (IXMLDOMSchemaCollection/XMLSchemaCache)  I'm
getting an error message about undefined CLSIDs, IIDs and so on. 
Maybe I'm not building from the right sources, or I'll have to define the
CLSID and IID myself in the source file.
Can anyone provide a small sample how to use it?
 
many thanks in advance:
 
 	Tamas