>I use _screen.properties as public variables, included variables such as totqty, totInv, creditcard, cardnumber, cardholder which go between two forms (invoice, payment).
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>I got confused when someone told me that in multi-users environment, if two users using the same form in the same time, then one is changing _screen properties for the other, while in my experience, it's not.
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>I wish I can get more info about it.
_screen is an object scoped to the current VFP (or a VFP executable) session. You can run dozens of these on the same machine at the same time, and each would have its own _screen (and _vfp, for that matter).