>>There is one onbard CALLBACK with VFP 6, (i thinks its a call back): COMRETURNERROR()
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>This is not a callback at all. It simply instructs your VFP COM server to raise a COM error by populating the COM exception structure and returning control to the calling process.
It triggers (pushes) a client ON ERROR event - isn't that a kind of call back. Part of the return string populates AERROR().
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>A callback is a very specific programming term that I think you are trying to use generally. It deals with delegating timing control to a called process, and allowing that process to directly invoke a function inside the caller.
It's pretty obvious what they do. Someone said VFP 7 would have an Event handler. I can't wait for
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>I would venture to say that if you have only programmed in VFP, you have never dealt with callbacks of any kind.
To busy writting big projects to learn other languages in detail. I use them when the need arises. Whats that old saying "..., but a master of none." I'm more of a business model analyst. Design and programing are the fun parts!