COM add-ins support only Outlook 2000 and can be written with VB. Client
extensions support all versions and require C++ or Delphi to work with
Extended MAPI. I don't know of any differences in the command bar support
between the two; maybe Dmitry can weight in.

Signature
Sue Mosher, Outlook MVP
Author of
Microsoft Outlook Programming - Jumpstart for
Administrators, Power Users, and Developers
http://www.outlookcode.com/jumpstart.aspx
> Hello,what is the difference between Outlook Client Extension DLL and
> COM-ADD IN?
> Will i be able to insert advanced toolbar(graphics,pop ups etc..) from the
> Outlook Client Extension DLL?
>
> 10x
Ken Slovak - [MVP - Outlook] - 30 Jan 2004 15:07 GMT
Not Dmitry, but I think you meant COM addins are for Outlook 2000 or
later only...
--
Ken Slovak
[MVP - Outlook]
http://www.slovaktech.com
Author: Absolute Beginners Guide to Microsoft Office Outlook 2003
Reminder Manager, Extended Reminders, Attachment Options
http://www.slovaktech.com/products.htm
> COM add-ins support only Outlook 2000 and can be written with VB. Client
> extensions support all versions and require C++ or Delphi to work with
[quoted text clipped - 6 lines]
> Administrators, Power Users, and Developers
> http://www.outlookcode.com/jumpstart.aspx
Sue Mosher [MVP] - 30 Jan 2004 16:11 GMT
Yup. Thanks.
> Not Dmitry, but I think you meant COM addins are for Outlook 2000 or
> later only...
[quoted text clipped - 20 lines]
> > Administrators, Power Users, and Developers
> > http://www.outlookcode.com/jumpstart.aspx
I personally prefer ECE over COM addins: ECE is the best of both worlds -
you can still use the ECE API (especially callbacks, which are much more
efficient than OOM events), plus you can always resort to OOM using
IOutlookExtCallback. Once you have a pointer to Application, your ECE can do
everything a COM add-in can, but do it in any version of Outlook.
Dmitry Streblechenko (MVP)
http://www.dimastr.com/
OutlookSpy - Outlook, CDO
and MAPI Developer Tool
> Hello,what is the difference between Outlook Client Extension DLL and
> COM-ADD IN?
> Will i be able to insert advanced toolbar(graphics,pop ups etc..) from the
> Outlook Client Extension DLL?
>
> 10x