dOPC Client Toolkit Help file
TdOPCEventServer Properties Published Properties
Published Properties
Published Property 
AutoDelete is set to True if events should be automatically deleted after they have been handled, otherwise False
Buffertime (milliseconds) contains the server's event notification sending frequency. 
EventlistSort contains the properties by which you can sort your events. 
Filter contains the TdOPCEventFilters used by the server. 
MaxSize contains the maximum number of events that will be sent from the server. 
OnBeginUpdate is generated before the server receives new event notifications. 
OnEndUpdate is generated when the server received new event notifications. 
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