>
> Sorry Florian, but IB_Query1.selected[I] don't change the actual
> record I think, only test if RecNO gived is or not Selected...
> I need first to PUT in this ROW before check any field.
>

What you have to do, is to loop through your dataset to see if one ore more records are selected. If
the record is selected, then do something with it. In code, it looks like this:

MyQuery.First;
while not MyQuery.Eof do
begin
if MyQuery.Selected[i] = True then
begin
MyQuery.FieldByName('String1').AsString := 'FooBar';
MyQuery.FieldByName('String2').AsString := 'BarFoo';
MyQuery.Post;
inc(j);
end;
qryFestBestell.Next;
inc(i);
end;