Luke,
you have a .NET c# app that launces/connects to Excel through (OLE)
Automation, and now want to launch a comm addin as well through the
..NET app?
The Excel.Applicatiob object has COmmaddins collection:
VB example:
Dim MyXLApp as Excel.Application
'.... connect to XL instance
'activates Registered COM addin:
MyXLApp.Commaddins("MyComProgID").Connect = True
Dm unseen