How to communicate between two GtkWindow widgets?

["张散集" <zhangsanji 126 com>]

Hi,

I'm a newbie to GTK+.

I know communication between the main window and a modal popup dialog is quite simple.
I can create a popuo dialog window, then run the dialog when I invoke the function called gtk_dialog_run.
Then, I will receive what I expect when I invoke the function named gtk_dialog_reponse.

But, I wonder how can I communicate between two GtkWindow widgets.
Whether can I use signals, or other methods to complete the task?

I need you some help, or some suggestions! 

Thanks a lot!




Sanji ZHANG
2007-08-20