A custom icon for my custom MessageClass
 

I have created a custom message Form and associated a custom icon and a
custom small icon to it.

I'm programmatically creating a message of this class, and I want it to
display the right icon, but I still get the standard enveloppe...
I've read many messages on this group about the subject, it seems to be
an ongoing problem, but I still can't find a definitive working
answer...

The PR_ICON_INDEX is at -1. ( seen through Outlook Spy )
When I open the message, my custom form is displayed correctly.
When I open the form in design mode, and go to property tab, the 2
icons are displayed correctly.
When I reset the Message Class to IPM.Note, and then back to
IPM.Note.MyClass, it doesn't update the icon either...

Anything I would have missed ?