once more textfield size limiting

[reuss]

i have nstextfield called label
i made a delegate for it:
[label setDelegate: self];
i would like to restrict text input to 10 chars

i was told that i should use control:textShouldBeginEditing:
method or implement a new one with
textView:shouldChangeTextInRange:replacementString:

but i dont know how
in my case, what is NSControl to use? and what NSText? (I tried [label
currentEditor], but it caused parser error.

if I used - textDidChange: Notification
I saw the input candidats but when I tried to restrict with
setStringValue , the field lost focus and input stopped.

have someone a short snippet or link with snippet to see"
thanks
andras