How to create COM sink using MFC?

Posted on 2008-06-21
Last Modified: 2013-11-26

I am having difficulties implementing a sink for a COM object dispatch interface. This is an MFC console application, so using wizards to add CCmdTarget automation is not an option.

I am not having any issues with using other interfaces (calling from my app into the COM object). It is the sink where I am running into a snag (from _Notify).

Here is a snippet of the TLH file, for which I need to implement the sink:
struct __declspec(uuid("2e21b3ec-f00f-f00f-8973-46d109c82f47"))  _TheLib;
struct __declspec(uuid("C3520671-f00f-f00f-9b96-0060083968AE")) _Notify;

TLI file for the interface of interest:
inline HRESULT _Notify::OnNotifyMsg ( )
    HRESULT _result = 0;
    _com_dispatch_method(this, 0x2, DISPATCH_METHOD, VT_ERROR, (void*)&_result, NULL);
    return _result;

Here is the IDL:
library TheLib
    // TLib :     // TLib : OLE Automation : {00020430-0000-0000-C000-000000000046}

    // Forward declare all types defined in this typelib
    dispinterface _Notify;

    dispinterface _Notify{
            HRESULT OnNotifyMsg();

I've generated the  IDispatch wrapper class using the Add Class from Typelib Wizard. I've then attempted to inherit and extend the method which I am interested in - but the sink never receives any events.

I would greatly appreciate help with this. I've tried many different ways of doing this, and have looked through other posts about this subject on Experts Exchange - without too much help.

Thanks everyone!

Question by:NotLogical
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
  • 2
LVL 49

Assisted Solution

DanRollins earned 150 total points
ID: 21842176
THis codeproject article should provide some clues.
   Handling COM Events in a Console Application

Author Comment

ID: 21842265

The article you offered is quite interesting, although the XYDispDriver class which is discussed only connects one COM object's dispatcher to another one. This is done in a console application, but it unfortunately does not create a sink within said console application.


LVL 19

Assisted Solution

alb66 earned 150 total points
ID: 21864592

Accepted Solution

NotLogical earned 0 total points
ID: 21871034
Thank you for your help... I think this will work!

Featured Post

Do you have a plan for Continuity?

It's inevitable. People leave organizations creating a gap in your service. That's where Percona comes in.

See how relies on Percona to:
-Manage their database
-Guarantee data safety and protection
-Provide database expertise that is available for any situation

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Today I had a very interesting conundrum that had to get solved quickly. Needless to say, it wasn't resolved quickly because when we needed it we were very rushed, but as soon as the conference call was over and I took a step back I saw the correct …
A long time ago (May 2011), I have written an article showing you how to create a DLL using Visual Studio 2005 to be hosted in SQL Server 2005. That was valid at that time and it is still valid if you are still using these versions. You can still re…
This video will show you how to get GIT to work in Eclipse.   It will walk you through how to install the EGit plugin in eclipse and how to checkout an existing repository.
In this video, viewers are given an introduction to using the Windows 10 Snipping Tool, how to quickly locate it when it's needed and also how make it always available with a single click of a mouse button, by pinning it to the Desktop Task Bar. Int…

617 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question