Re: Extending ATL COM Object Dual Interfaces

From: Alexander Nickolov (agnickolov_at_mvps.org)
Date: 06/26/04

  • Next message: Alexander Nickolov: "Re: Creating object inside an ISAPI DLL - does registry settings required?" 
    Date: Sat, 26 Jun 2004 14:22:43 -0700

    Seems pretty standard to me, providing you have the source code.
    Not sure if you can do it in VB without breaking COM rules, but
    in C++/ATL it's rather straightforward. You derive a new dual
    interface from the old one, then implement it. These FAQ articles
    should give you the idea how it is done in source:

    http://www.mvps.org/vcfaq/com/7.htm
    http://www.mvps.org/vcfaq/com/8.htm 

    -- 
=====================================
Alexander Nickolov
Microsoft MVP [VC], MCSD
email: agnickolov@mvps.org
MVP VC FAQ: http://www.mvps.org/vcfaq
=====================================
"Doug C. Mace" <dcmace3@NOSPAMadelphia.net> wrote in message
news:a_KdnWqJ_dcXGEDdRVn-vg@adelphia.com...
> Alexander or Igor,
>
> I have a need to extend existing CoClass functionality with dual
interfaces
> and searching for viable solutions. I discovered a April 1999, Windows
> Developer Journal article by Howard Silver titled "Extending ATL COM
> Objects". Are you familiar with this article? I tried the solution in VB
and
> it seems work but need an opinion to determine if it contains any flaws or
> breaks COM rules. I didn't want to post the entire article and solution in
> the group since its lengthy. However, I can zip up the article and code
> snippets and transmit to either of you experts if you have private email.
>
> Can't seem to find a lot of information on the subject so looking for
> sources of information. Also, the CoClass must contain dual interfaces to
> support scripting clients as well as vTable support for early binding.
>
> Your help would be greatly appreciated.
>
> Doug
>
>
>
>
  • Next message: Alexander Nickolov: "Re: Creating object inside an ISAPI DLL - does registry settings required?"

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