using kr.pe.elex.hello_world; namespace kr.pe.elex.hello_world { class MyApplication : Gtk.Application { protected override void activate () { var window = new Gtk.ApplicationWindow (this); window.set_title ("Welcome to GNOME"); window.set_default_size (200, 100); var label = new Gtk.Label ("Hello GNOME!"); window.add (label); window.show_all (); } } } int main (string[] args) { return new MyApplication ().run (args); }