Martin wrote:

> There have been alot of how to questions on the list lately so here is
> another one for the Edit Field Experts.
>
> How can I restrict the number of characters that a user can type into an
> edit field. Using _framedNoCR gives us a field that can be typed into,
> let's say we only want the user to type 50 characters or at most stop at
> the width of the field. If you hadn't noticed you can keep typing beyond
> the length of the visible field and when you grab the contents it has
> the extra there.
>
> Using LEFT$ is no good as that is an after the event type process.
>
> I want to be able to tell them as they are typing enough is enough.
>
> In GFA BASIC for PC the edit field does the job.
>
> Any suggestions
>
> Fitzy

I encountered this problem but solved it fairly easily.  Use ON EDIT fn
filterKeys to check the number of characters in the field each time a key is
pressed:

LOCAL FN filterKeys
key$ = TEKEY$
LONG IF LEN(EDIT$(efID)) =< maxChars
    TEKEY$ = key$        'Ok send the keystrokes through
XELSE
    BEEP                         'Too many chars in edit field!
END IF
END FN


ON EDIT fn filterKeys