Get Recurrence Appointments By TimeSpan

Hello

I have a problem with recurrence pattern.

Appointments are loaded for a selected timespan (for example April 2015).

The problem is, that I don't see any ​recurrence-​appointments, when the main-​appointments ​are not in the ​selected timespan, because main-appointments are not loaded and therefore the recurrence-appoin​tments by recurrencerule are also not loaded.

How can I detect all ​recurrence-appointments for the selected timespan without loading all the main-appointments?

Sincerly

A.Kasar