RE: [External] : Saving variables for use between emacs sessions

[Drew Adams]

> Right, I want to have a user option, but although I want to allow a user
> to set the value,
> I also would like to set a value in an automatic way, using a function
> that does the
> necessary calculations, and stares the answer in the variable.
> 
> How does one let a user change a value, and how can I save it
> automatically as well?

Just define the option with defcustom.

Users can use Customize to change the
value and save that new setting to their
`custom-file' or init file.

Or they can use `custom*' functions to
set and to save.  Or you can use such
functions to do that for them "in an
automatic way".

Just look into what's available - it's
all there.  You, yourself, can easily
check it out.