modem status

[root <defcon5 ec-red com>]

Hi

I am trying to make a GTK program that executes my internet connection
scripts in
/etc/ppp(because gnome-ppp doesn't work and KPPP eat my memory like
CRAZY!!).
it has a button that executes pppd. My problem is how can i tell my
program that the modem has established the conection with my ISP??
knowing that i want to show
a window that tells the user that the connection is done.
Is there any system call?? any ideas??

Thanks.