[vbox-dev] Question about IEvent capabilities in v4.x.x

Joseph Smith joseph1962smith at yahoo.com
Fri Feb 11 14:26:33 PST 2011

Hi All,

The IEvent capabilities that have been introduced in v4.x.x work quite nicely.

I have a question about how much information is available when an event is 

Does the IMachineDataChangedEvent (OnMachineDataChanged) provide a means of 
determining the specific data that has changed?

Maybe it's possible and I have missed something.

Other events (e.g: INATRedirectEvent) provide a means of determining that 
information without retrieving  entire data-set.

Thus far, since I am unable to determine which specific machine data changed, it 
seems the only way to ensure I am in-sync is to retrieve all the machine data 
(attached storage controllers, audio settings, serial-port settings, VRDEServer 
settings, etc).  If that is the case ... that's a lot of overhead if there are 
many machines that are frequently being modified.

Hopefully I've missed something.  Any feedback is appreciated.


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