Hi Ed,

>Yep - as long as you provide an active callback funtion point, you can access that - but now you -must- have a .FLL (or possibly, it can be done with a wrapper .DLL publishing the callback; haven't tried it) but not with just VFP code.

Depends. *g* If you have a function that passes exactly 4 integer parameters and the first one happens to be a window handle and the second one is a Window message. Then you can use the window procedure of a form and use the event to capture the callback. *bg* But that's probably only the case with call back messages like the system tray sends them if you use something like ShellNotfiyIcon().

Christof