.NET msdn walkthrough is not running

[Raj]

I want to invoke Ms agents using Network Query Language.
the Nql comes with a ATL COM INTERFACE (NQLATL.DLL )
and the help intro reads "The ATL COM interface (NQLATL.
DLL) is a lightweight alternative to the ActiveX interface.
"
as it is a unmanaged dll i wanted to do something similar.


I followed the Visual C++ getting started walkthrough:
Exploring COM Interoperability with ATL and managed
extensions for C++.


but even this doesn't compile.
it gets prodLookup.dll and the following set of error
messages appear.
COMProdClient.cpp(20) : error C2871: 'ProdLookup' : a
namespace with this name does not exist
COMProdClient.cpp(21) : error C2065: 'IFindProductInfoPtr'
: undeclared identifier
COMProdClient.cpp(21) : error C2146: syntax error : missing
';' before identifier 'pFindProductInfo'
COMProdClient.cpp(21) : error C3861: 'pFindProductInfo':
identifier not found, even with argument-dependent lookup
COMProdClient.cpp(24) : error C2227: left of
'->raw_GetItemDescr' must point to class/struct/union
type is ''unknown-type''
COMProdClient.cpp(24) : error C3861: 'pFindProductInfo':
identifier not found, even with argument-dependent lookup
COMProdClient.cpp(25) : fatal error C1903: unable to
recover from previous error(s); stopping compilation


can anybody please help me out of this ordeal