How do I find out how many hours a particular model has beenopen/worked on?

Usually, file properties tells you when the file was created, andwhen it was last modified.

I'd like to knowhow long a file was open, andhow long the engineer spent working on this model.

I know AutoCad will give you this data, and I'm sure SolidWorks cando it, too.

Thanks.SolidworksGeneral