Extension/Preferences shared variables

[Vadim <vadim dbfin com>]

Hi everyone,

I was wondering if there is a common way to share a variable between an
extension and the preferences dialog.

Let say, I want to set some "global".variable within the preferences
dialog (temporary until it is closed), and the running extension should
react on this, i.e. it should see that the variable was set.

Thanks in advance,
Vadim