Do you mean that you've modified the Windows registry to make Outlook use
IPM.Appointment.MyForm as the default appointment form instead of
IPM.Appointment? If so, then all IPM.Appointment items will display in the
IPM.Appointment.MyForm form. But if you have any items with a MessageClass
value of IPM.Appointment.AnotherForm, they will continue using that form.
Data always carries over; it's totally independent of the form that the
MessageClass property points to. Whether you can see the data in the UI is,
however, dependent on the form design.
--
Sue Mosher, Outlook MVP
Author of Microsoft Outlook 2007 Programming:
Jumpstart for Power Users and Administrators
http://www.outlookcode.com/article.aspx?id=54
"ghillie30" wrote:
> I've started using a custom appointment form in Outlook 2007. If I set the
> custom form as the new default today, will appointments previously entered
> with the old form still open with the old form, or will they open with the
> new form? If they do open with the new form, will data carry over (if old and
> new fields are the same)? Thanks.