Thank you for your answer! I can't see any improvment with the current 4.9.14 Eval-Edition...

I hope Jason can solve the problem without the IB_Session :-)

--- In IBObjects@yahoogroups.com, "Carlos H. Cantu" <listas@...> wrote:
>
> W> it seems a bit complicated... In the meantime I found out, if I
> W> start the loop (via ButtonClick) and move the mouse outside the
> W> main window, the performance is nomal! Only if the mouse cursor is
> W> inside the window, performance is slow...
>
> This is probably due to cursor flickering. You can test with the
> latest version of IBO and probably you will notice it is much better
> than the behavior you are facing now.
>
> Also, you can test dropping a IB_Session in your application and
> setting UseCursor to FALSE (but you will loose the automated IBO
> screen cursor handling).
>
> []s
> Carlos H. Cantu
> www.FireBase.com.br - www.firebirdnews.org
> www.warmboot.com.br - blog.firebase.com.br
>