Are you opening Excel manually or via automation?
Add-ins do not load when Excel is opened using automation.

Tim

"bill" wrote in message
...
All,

I am using Excel 2007. I create an Excel file with my C# app and all
is well.... except for add-ins. When I open the file that I created
add-ins are not enabled. Actually I think they are enabled, but the
Add-in menu is not on the menu bar, and when I enter a formula that
references one, it does not work. However, they are checked in the Add-
in window. Also, the Trust Center has macros enabled. What am I
missing here?

TIA,

Bill