Can't load .NET COM Add-In

Can't load .NET COM Add-In

Post by R3V5 » Fri, 08 Apr 2005 02:51:04


I followed Andrew's great MSDN article "An Introduction to Programming
Outlook 2003 Using C#". I downloaded the code sample (Add-In sample), rebuilt
and installed it but it didn't seem to work (on one machine it was perfectly
OK, but I can't tell the difference between them).
The Add-In was registered successfully in the Registery and I installed the
PIA for .NET before installation.

Do you know what might cause this problem?
BTW, I reinstalled Office 2003 again and it didn't help.
This is the link to the article


1. COM Add-in Shim for Deploying Managed COM Add-ins in Office XP

2. Outlook COM Add-In not listed in "COM Add-Ins" menu

Hi all,

I wrote Outlook COM Add-In that adds a custom toolbar to Outlook. It
was working fine, but few days ago, the custom toolbar just
disappeared. Suspecting my COM Add-In was being disabled, I opened
Outlook "Disabled Items" window to find that my COM Add-In was not
listed there. Then, I opened up "COM Add-Ins" window expecting to see
my COM Add-In being unchecked. However, my COM Add-In was not even
listed there! I even tried to register my COM Add-Ins manually by
using "regsvr32.exe", but still couldn't see my COM Add-In in "COM
Add-Ins" window.

I even searched system registry to make sure that COM Add-In object
was properly registered, and found nothing wrong. Can anyone please
tell me in what circumstance, an Outlook COM Add-In stops showing up?
Here is my system spec,

Windows XP/SP1
Outlook XP/SP1


3. Com add-ins versus normal add-ins?

4. COM Add-ins, VS 2008 and .NET Framework 2.0

5. .NET Invisible in SR-1 COM Add-Ins dialog

6. How to apply Windows XP themes to VS .NET COM add-ins

7. COM Add-ins not loading

8. Adv Opts Add-In Manager/COM Add-Ins disabled--why?

9. Word Add-In not in COM Add-Ins List

10. Inserting an "Add-In" in Excel "Com Add-Ins" box

11. Excell 2003 - COM Add-in - Tools | Add-Ins

12. OL03: Adv Opts Add-In Manager/COM Add-Ins disabled--why?

13. ANN: Add-in Express .NET - Start Your Add-ins, Smart Tags and RTDS Faster

14. Can only remove add-ins but cannot add add-ins in Outlook 2003 anymore