Dialog question.

[Dominik Smogor <duce fanthom math put poznan pl>]

I started developing gtk apps about a month ago and I have a simple
question. I'd like to make a function with proto like this.
	int mesg(gchar *message)
This should create a modal dialog with the message and a few buttons
and return a button number after user have clicked it. How to implement
this while the function is called from callback?