Excel and VSTO

[dasmith]

I am struggling with the distinction between a VSTO Excel AddIn and a
Shared AddIn. It seems that with VSTO Excel AddIn that I cannot
reference it through VBA. Thus I cannot access any of its properties
or methods through VBA code. With a shared add-in, I can reference
through VBA. But it seems that I do not have access to everything
that is available in a VSTO Excel Addin (such as Custom Task Panes).

Does this seem correct or am I missing the boat here? I am using
Office 2007 and VSTO 2005 SE.

Thanks in advance for any direction you can give me.
Darryl