OK, attached. So, I need the filled grid from csv and a very first column that contains the line numbers.
Doesn't matter if the line numbers column is fixed or not. Fixed is a bit better.
Also, how can I achieve that button caption do show the "Loading ..." text during the load process (the real list contains more than 100.000 lines)?
I tried the
Button1.Caption:='Loading ...';
Button1.Update;
and
Button1.Caption:='Loading ...';
Button1.Repaint;
but none of them was good.