Re: MSXML Interfaces appearing in my TLB

"Alexander Nickolov" <>
Tue, 19 Jun 2007 09:39:37 -0700
It's very suspicious you have an import within the library block.
Move it out to the beginning of your IDL file together with the
other imports. Not sure if that's the problem, the msxml3.dll
importlib statement is more likely to be the issue (incorrect
path for example), but that's for you to track.

Alexander Nickolov
Microsoft MVP [VC], MCSD

<> wrote in message

We recently converted a project that included several IDL files that
compiled into a TLB from VC6 to VS2005. Our appliacation stopped
working, and we traced oit to the fact that one TLB was importing
MSXML and the MSXML interfaces were now embedded in the TLB. When
this TLB gets registered, it over-writes the registry entries for
MSXML. This IDL compiled fine in VC6 but the problem occues using
midl.exe from either VS2003 or VS 2005.

here is the main IDL file:
//IDLs imported
import "oaidl.idl";
import "ocidl.idl";

   helpstring("My Type Library")
library MyLibrary
importlib("..\..\Install Files\msxml3.dll");
import "MyInterface.idl";

interface MyInterface;

The interface that actually uses MSXML looks like:

import "oaidl.idl";
import "ocidl.idl";

interfaceMyInterface : IDispatch
   [id(1), helpstring("Creates an empty XML document.")]
   HRESULT Initialize();

   [propget, id(2), helpstring("Returns a reference to the internal
XML DOM document.")]
   HRESULT XMLDOMDoc([out, retval] IXMLDOMDocument **ppXMLDOMDoc);

   [id(3), helpstring("Find an element or create the element.")]
   HRESULT find_element_or_create([in] BSTR bsElementTag,
                                  [in] IXMLDOMElement *pObject,
                                  [in, out] IXMLDOMElement
                                  [in] VARIANT_BOOL bForceNew);

Any Ideas?

Thanks in advance

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