switching from one window to another in GTK2 using Glade

["Manish Chakravarty" <manishchakravarty yahoo co in>]

hi,
today is the first day i worked with glade & gtk
went throught the docs and my prob is
glade creates a file called callbacks.c and expects us to write the code for
the events there
i have two windows called first and second
when i click the "OK" button on the first i want the first window to
disappear and second window to appear
Also, what is the correct file to place my code for switching between
windows? is it callback.c?
Help will be greatfully acknowledged and will be terrific morale booster for
a newbie
Regards
Manish