PROBLEM: onBeforeDelete event

Question

Hi,

I have a problem with onBeforeDelete in VSTO Add-In for Outlook.When I add 4 items in calendar one by one and then I delete them one after another in short time interval the onBeforeDelete event is araised only once. Does anybody know sth about it?? Why is this happening. Sb wrote on a forum there is a possibility to use onAddItem event for Deleted Items folder but if I use Shift+Del shortcut on an item, it won't be moved to this folder. Am I right?

Regards,
Lukas