>>You're absolutely right, of course. I don't know why we didn't subclass it. May be because builder uses this particular class, though I'm not 100% sure it's not customizable. But at this point of development it's too late to switch to subclass of cGridTextBox class.
>
>May be, but it should be fairly easy to hack the form to change cGridTextBox's parentage and point it to your subclass instead.

We would need to hack several form classes... I think, it's not worth it. Besides, the probabily of the new framework version is 0.0001%