Docmd.SendObject, Lotus Notes and Exchange

[TR]

Hi,
Just noticed something unusual. If I use Docmd.SendObject in Access 97,
access will open up Lotus Notes to send the email.
here is the code:
DoCmd.SendObject , , , "So******@Somewhere.com", , , "Subject Line",
"Body Text", False

If I use the same line of code in Access XP, the message is sent through
Exchange. This is happening on the same machine (Win XP). Any ideas why
Access97 will use Notes, and XP will use Exchange? Exchange is, as far
as I know, my default email application. Do they look in different
places in the registry for the default email client? If so, where are
they looking?

Thanks,
Tom