Thank you and sorry Cetin, i think this but not test.
Why ?

If refresh resync grid visual area, i have opposite problem:

user or program ( like timer ) scroll grid rows, without change ActiveRow.

On background a Timer refresh grid data;
i need preserve user grid visual area and, if record exist recover record pointer ( no fliker on grid ).

I have no problem with timer/record pointer/asyncronous... but i would not want to chase every movement of the grid in order to know the position of the first visualized row.

I can found a simple solution ?

Fabio