How are you giving them access to the linked files?

If say, they go in through you app and make changes, would it be enough to note the time they accessed it?

Or, let's say it's BMP, and somebody might make a change using MSPaint w/o going through your app, would you need to rescan the file date and time when the app was restarted?

>We just need to know that changes were made. One of the general fields holds bitmaps and another holds a sketch from another software product.