Re: importlib with shared interfaces

From:

"Alexander Nickolov" <agnickolov@mvps.org>

Newsgroups:

microsoft.public.vc.atl

Date:

Fri, 26 Jan 2007 18:02:20 -0800

Message-ID:

<eahlucbQHHA.1200@TK2MSFTNGP04.phx.gbl>

If you insist on a type library, you have to use #import.
If an IDL is ok with you, don't forget to add its _i.c to
your project (or #include it in a single file as ATL does)
so the linker is happy.

--
=====================================
Alexander Nickolov
Microsoft MVP [VC], MCSD
email: agnickolov@mvps.org
MVP VC FAQ: http://vcfaq.mvps.org
=====================================

"khalprin" <khalprin@discussions.microsoft.com> wrote in message
news:1FE411A4-7012-46FD-87B9-5A6263A54B0A@microsoft.com...

Hello,

I can't seem to get all the details correct to accomplish the following:

1. Define interfaces in .idl file - In this case there are 5 related
interfaces.
2. Build a type library from the .idl file
3. Use "importlib" in the .idl file of a C++ (ATL) project to expose (and
then implement) the 5 interfaces.
4. Build the C++ project without errors.

I can define the interfaces in the .idl file and use midl to compile it.
I
can also include a library block in the .idl file to get a type library
from
it.

I can use "importlib" in the .idl file of the C++ project but the build
generally results in either unresolved externals for the CLSIDs, or errors
about undefined IID_<interface>.

I've tried using the 'Implement interface wizard' in Visual Studio (2005),
but it puts the interface definition from the typelibrary into the .idl
file
of the project with no methods or properties. If I have to do that
manually
I may as well not use the wizard or the external typelibrary.

I want to use the typelibrary approach because these interfaces will be
implemented in different components and I want to make sure that
components
in VB (and .NET) languages can implement them fairly easily.

Can anyone point out a detailed sample or give me some step-by-step
instructions?

Thanks.