I have a custom class, and upon OnDelivery, if I find a message of
this class, I set the icon via PR_ICON_INDEX. However, it is not
working. I am simply just giving the id of the icon from resource
file. (How do I setup a proper id?)

If possible, I do not wish to make a custom form, I just simply want
to show the icon, instead of the standard icon the standard mail view
(inbox by default)

Any help, much appreciated,

Thanks, J