GTK+ / Gnome Application Development . ... This chapter contains some commonly-asked questions, and answers, with references to the rest of the book. ... Call the gdk_beep() function. See the section called Widget Life Cycle in the chapter called GTK+ Basics for the simple answer, and the section called Object Finalization in the chapter called The GTK+ Object and Type System for more details. ... Finally, some of the Gnome widgets were considered too "experimental" to go in GTK+ at the time. ...