User Extensions/Externals

[Paul D. DeRocco]

> From: J. Landman Gay
>
> > As someone who's just learned enough of Revolution to write one
> rather basic
> > app, I'm having trouble understanding the documentation on the "startup"
> > message. The docs mostly seem to be about U3 drives, which is
> irrelevant,
> > but the example implies that in a non-U3 situation the mode parameter is
> > empty.
>
> The mode parameter only applies to U3 apps. It isn't needed or used any
> other time, and was only added later on when Rev began supporting
> U3 builds.
>
> > But then there's this: "If the application is opened with multiple
> > stacks, the startup message is sent to the first stack opened."
> Does this
> > mean to imply that something different happens if there's only
> one stack?
>
> No. The first stack, even if it is the only one, gets the startup
> message. Startup is only sent once, immediately on launch, before any
> other messages or actions occur. It's the first thing that happens,
> before any stacks load.
>
> > If not, does it get sent before preOpenStack?
>
> Yes. Before everything.
>
> > Do I understand your example to
> > mean that it happens before the externals are loaded?
>
> Yup. Which is why it's the only time you can set externals, because no
> stacks are loaded yet. Startup is like ground zero. After that, the
> first stack loads (with its newly set externals) and by then it's too
> late to change its externals.
>
> > Does preOpenStack happen after the externals are loaded?
>
> Yes.
>
> > If so, then it looks like I could
> > simplify my code, and just do everything in the "startup" handler.
>
> That's what I do. :)

Thanks. That makes my life a little easier.

Perhaps they should hire you to write their docs. ;-)

--

Ciao,               Paul D. DeRocco
Paul                mailto:pderocco at ix.netcom.com