void gtk_window_set_title ( GtkWindow* window, const char* title )
Sets the title of the
The title of a window will be displayed in its title bar; on the X Window System, the title bar is rendered by the window manager so exactly how the title appears to users may vary according to a user’s exact configuration. The title should help a user distinguish this window from other windows they may have open. A good title might include the application name and current document filename, for example.
NULL does the same as setting the title to an empty string.