Difference betn. Add-in and COM Add-in

[C Chandrashekhar]

Hi,
Can anybody will let me know the difference between Outlook Add-In and
Outlook COM Add-in?

 

[Ken Slovak - [MVP - Outlook]]

Old style Exchange extensions are written only using Extended MAPI (C++ or
Delphi only), use an ECF file for configuration and work with all versions
of Outlook. COM addins can be written in any high-level language that
supports COM and are supported for only Outlook 2000 or later. They can be
written using the Outlook object model, Extended MAPI, CDO 1.21 and so on.

 

[C Chandrashekhar]

True...
But I came accross the add-in which is neither following the COM add-in
model/architecture nor using the ECF file. But it is using the Exchange
client extension model. And that's where I got confused that the addin is
following Exchange client extension model and not using the ECF file.
Could you please elaborate on this?
Regards
CC

 

[Ken Slovak - [MVP - Outlook]]

I have no idea. Exchange client extensions use ECF files. Since I don't
write Exchange extensions I don't know if you can have one without an ECF.
You can probably check that on MSDN.