Hi,

The CustomGrouping example illustrates how to perform selective custom grouping. First, you define the resources and add them to the respective calendar collections. Then, you specify the primary and secondary resources through the Calendar.GroupType and Calendar.SecondaryGroupType properties. In case the primary and secondary resources reside in the same calendar collection (as is the case in the example), you need to use the Calendar.CustomGroupType and Calendar.CustomSecondaryGroupType properties to specify the resources by their runtime type. Finally, in order to perform selective grouping, you need to handle the Calendar.CustomizeGrouping event. This event is raised once for each primary resource in order to determine which are its associated secondary resources. In your case, you should handle this event and add to the CustomizeGroupingEventArgs.GroupByResources collection only the contacts that have a reference to the respective resource.

I hope this helps.

Regards,
Meppy