Level at which termination the function shall be called. You can pass 0 here to have the function run at the termination of the current mainloop.
Pointer to pass when calling function.
A handle for this quit handler (you need this for gtk_quit_remove()) or 0 if you passed a NULL pointer in function.
Warning gtk_quit_add is deprecated and should not be used in newly-written code. This function is going to be removed in GTK+ 3.0 Registers a function to be called when an instance of the mainloop is left.