OK, allow me to ask the question more succinctly and directly.

What does it mean to install an ecf file? How can this be done from an
installation program during product install?

Dave Smith

"Dave Smith" wrote in message
...
When I open the Add-In Manager window from Tools\Options\Other\Advanced,
it has a button labeled "Install." Clicking on it presents a file open
window on the ADDINS folder of my Office installation folders, showing the
.ecf files available.

OK, I write the code. Someone else writes the installation script. I have
one environment where the user has to come to this window and use this
"Install" button to manually install the ecf file for my add-in. In all
other environments, my add-in is automatically installed by the
installation kit that installs the containing product.

I have checked, and all of the appropriate entries are being added to the
HKLM\SOFTWARE\Microsoft\Exchange\Client\Extension key.

I have been asked to find out why. But I don't know exactly what it means
to "Install" the ecf file. Can someone enlighten me?

Thank you.

Dave Smith