TEST #1

using Gtk;

[CCode (cname = "G_MODULE_EXPORT on_button1_clicked")]
public void on_button1_clicked (Button source) {
    entry.set_text("TEST NUMBER ONE!");
}

public void on_window1_destroy (Window source) {
    Gtk.main_quit ();
}

int main (string[] args) {
    Gtk.init (ref args);

    var builder = new Builder ();
    builder.add_from_file ("sample.ui");
    builder.connect_signals (null);
    var window = builder.get_object ("window1") as Window;
    var entry = builder.get_object ("entry1") as Entry;
    var button = builder.get_object ("button1") as Button;

    window.show_all ();
    Gtk.main ();

    return 0;
}