Automatically generated code by Glade.. where to put certain functions?

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

the glade manual says that i have to edit the callbacks.c file to get
going..
here is what i want to do:
i have designed two window widgets using glade and when i press the OK
button on the first one, i want the second one to be displayed.
in which file do i place the code to do this stuff? i guess i cannot do it
in main.c and i callback.c it does not work.
i mean where do i put all the "GUI Logic" for the program. The glade manual
sucks
please help
manish