diff --git a/src/gtkgui/mainwindow.cc b/src/gtkgui/mainwindow.cc
index ad5aa48..c303765 100644
--- a/src/gtkgui/mainwindow.cc
+++ b/src/gtkgui/mainwindow.cc
@@ -23,9 +23,24 @@
 
 #include "mainwindow.hh"
 
+#include <gtkmm/box.h>
+#include <gtkmm/button.h>
 #include <gtkmm/main.h>
+#include <gtkmm/menubar.h>
 #include <gtkmm/window.h>
 
-MainWindow::MainWindow() {}
+MainWindow::MainWindow() {
+  set_title(PACKAGE_STRING);
+  set_default_size(800, 600);
+
+  Gtk::Box* mainbox = manage(new Gtk::VBox());
+  add(*mainbox);  
+
+  Gtk::Button* bt_exit = manage(new Gtk::Button(_("Exit")));
+  bt_exit->signal_clicked().connect(sigc::ptr_fun(Gtk::Main::quit));
+  mainbox->pack_start(*bt_exit);
+
+  show_all_children();
+}
 
 MainWindow::~MainWindow() {}
diff --git a/src/gtkgui/startgui.cc b/src/gtkgui/startgui.cc
index 035870f..41c619c 100644
--- a/src/gtkgui/startgui.cc
+++ b/src/gtkgui/startgui.cc
@@ -25,12 +25,11 @@
 #include "startgui.hh"
 
 #include <gtkmm/main.h>
-#include <gtkmm/window.h>
 
 void DLLEXPORT
 start_gui(int argc, char** argv) {
   Gtk::Main gtk_main(argc,argv);
-  Gtk::Window main_window;
+  MainWindow main_window;
   Gtk::Main::run(main_window);
 }