Does is make a difference if database.stringP is declared const Char*??
Thanks,
Andy
in article 27664@palm-dev-forum, Chris Tutty at
[EMAIL PROTECTED] wrote on 10/21/00 11:23 AM:
>
> "Andy Black" <[EMAIL PROTECTED]> wrote
>> I am having some problems getting text from editable text fields and I
> think
>> the error is in the function below. I can get data from the text field
> fine
>> the first time around. But, if you edit the text field and then try to get
>> the data from the edited field, I get an error that states "Field Object
>> Improperly Locked". Here is an example of how I call this function:
>>
>> stringP = GetLockedPtr (whateverField);
>> if (stringP)
>> {
>> database.stringP = stringP;
>> MemPtrUnlock (stringP);
>> }
> This suggests that you're storing the pointer for later reference, but if
> the field editing increases the amount of buffer space required then
> PalmOS will resize the chunk, possibly (probably) relocating the chunk
> at the same time. This will invalidate your pointer.
>
> In general I think it's advised that you store handles rather than pointers
> in database records and even these are questionable since they might be
> referred to after a restart when that handle might no longer be allocated
> (although since I've never tried to do this I can't state that it's not
> valid).
>
> Chris Tutty
>
>
>
>
--
Andy Black
[EMAIL PROTECTED] http://www.SpazTheCat.com
Unix is user friendly. It is just picky about who its friends are.
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