James Lewis <[EMAIL PROTECTED]> writes:
> I am responsible for maintaining code someone else
> created, and we are in the process of modifying some
> of the application preferences stored(adding more).
> The intention is that we add some additional
> preferences, and after the user has synched the
> handheld device to install the upgraded version, it
> should check upon startup whether the new preferences
> can be retrieved from the system. So, I first call
> PrefGetAppPreferences and retrieve the size of the
> preferences block, then call it again with the
> appropriate size preferences structure to retrieve the
> actual preferences, whether we need to use the old
> preferences structure or the new one with additional
> fields.
>
> This seems like the correct thing to do, and works
> very well in the emulator. However, it doesn't work
> well at all on the actual Palm IIIx(OS version 3.1.1),
> where it always seems to say the preferences block is
> the new size, and loads the preferences with garbage
> for the new fields.
>
> Any help or insight would be appreciated,
PrefGetAppPreferences() returns the version of the preferences that was
defined when the prefs were set with PrefSetAppPreferences(). Each time
you change a prefs structure, you should start passing a newer version
number to PrefSetAppPreferences(). Then, when you get the prefs, you
examine the version number that is returned and decide if you need to
migrate the structure.
--
Dave Carrigan ([EMAIL PROTECTED]) | Yow! Where's th' DAFFY DUCK
UNIX-Apache-Perl-Linux-Firewalls-LDAP-C-DNS | EXHIBIT??
Seattle, WA, USA |
http://www.rudedog.org/ |
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