Filter subscriptions - by: federica

Hi,

I'm using QuickOPC COM, developing in C++.

I want to be notified when a particular tag in the OPC server will change its value.
I'm only interested in receiving new data only when the value has changed.
How can I add a filter to the "SubscribeDataChange" function (like "UADataChangeTrigger.StatusValue")?

Thanks,
Federica