Hi Barry,

What kind of add-in are you talking about. Is it an Excel workbook you
created, an add-in that comes with Excel, or something else? A better
solution might be to simply use xlApp.Workbooks.Open to directly open the
add-in file instead of using the AddIns.Installed method.

--
Rob Bovey, MCSE, MCSD, Excel MVP
Application Professionals
http://www.appspro.com/

* Please post all replies to this newsgroup *
* I delete all unsolicited e-mail responses *


"Barry" wrote in message
...
Hi Rob,

Thanks for your reply. I know about the setting of the
installed property and I tried it but still in vain. I
checked the Add-ins dialog box and saw the checkbox for my
add-in can be on or off by the value of true or false
respectively for the installed property. When I clicked
the Edit Links button on the Update Links dialog box I saw
my add-in's status was "Undefined or non-rectangular
name", is there anything wrong with my add-in?
However, if I opened my spreadsheet manually with the add-
in checked, I saw the "Source open" status.

Barry