The article I was referring to is this one:
http://msdn.microsoft.com/en-us/library/bb332051.aspx

A shared addin directly uses the Extensibility interfaces to connect the
addin to Outlook. A VSTO addin hides that from you and provides you with
Startup() and Shutdown() events instead,

A VSTO addin also handles various other things for you, including loading
the addin with shimming to provide an isolated AppDomain for the addin so
any problems with that addin or with other addins are isolated from each
other.

A shared addin will share an AppDomain with any other managed code addins
unless it's shimmed (using the COM Shim Wizard or a custom shimming action).
With a shared addin you have to shim it to provide AppDomain isolation.

--
Ken Slovak
[MVP - Outlook]
http://www.slovaktech.com
Author: Professional Programming Outlook 2007.
Reminder Manager, Extended Reminders, Attachment Options.
http://www.slovaktech.com/products.htm


"anindasen_0609" wrote in message
...
Hi Ken,

Thanks for the answer. Sorry for not giving the details. I am using Visual
Studio 2005, VSTO and Microsoft Windows XP is my OS.

I actually prepared the installation files form one quite extensive
article
in MSDN which was very helpful. I do not know which one you are referring
to.

What is shared adding by the way. Would be grateful if you can provide
some
information on that.

Regards,
Aninda