diff --git a/Gtkmm3/gtk79_livetest/CMakeLists.txt b/Gtkmm3/gtk79_livetest/CMakeLists.txt
new file mode 100644
index 0000000..fea7e84
--- /dev/null
+++ b/Gtkmm3/gtk79_livetest/CMakeLists.txt
@@ -0,0 +1,22 @@
+set(CMAKE_CXX_STANDARD 17)
+cmake_minimum_required(VERSION 3.0.0)
+project(gtk79 VERSION 0.1.0)
+
+include(CTest)
+enable_testing()
+
+set(CPACK_PROJECT_NAME ${PROJECT_NAME})
+set(CPACK_PROJECT_VERSION ${PROJECT_VERSION})
+include(CPack)
+
+find_package (PkgConfig REQUIRED)
+pkg_check_modules (GTKMM3 REQUIRED gtkmm-3.0)
+include_directories (${GTKMM3_INCLUDE_DIRS})
+include_directories (..)
+link_directories (${GTKMM3_LIBRARY_DIRS})
+
+#names of source files
+add_executable(gtk79 src/main.cc src/MyWin.cc)
+
+add_definitions (${GTKMM3_CFLAGS_OTHER})
+target_link_libraries (${PROJECT_NAME} ${GTKMM3_LIBRARIES})
diff --git a/Gtkmm3/gtk79_livetest/src/MyWin.cc b/Gtkmm3/gtk79_livetest/src/MyWin.cc
new file mode 100644
index 0000000..d74c600
--- /dev/null
+++ b/Gtkmm3/gtk79_livetest/src/MyWin.cc
@@ -0,0 +1,67 @@
+#include "MyWin.hh"
+#include "winpe.xpm"
+
+MyWin::MyWin()
+:btn_back("Change Background")
+{
+    set_icon_name("org.gtk.daleclack");
+    set_default_size(640,360);
+    //Add Overlay and image to the window
+    add(overlay);
+    overlay.add(back);
+    //Add the button
+    btn_back.set_halign(Gtk::ALIGN_CENTER);
+    btn_back.set_valign(Gtk::ALIGN_CENTER);
+    btn_back.signal_clicked().connect(sigc::mem_fun(*this,&MyWin::btnback_clicked));
+    overlay.add_overlay(btn_back);
+    //Background
+    Glib::RefPtr<Gdk::Pixbuf> pixbuf=Gdk::Pixbuf::create_from_xpm_data(winpe);
+    Glib::RefPtr<Gdk::Pixbuf> sized=pixbuf->scale_simple(640,360,Gdk::INTERP_BILINEAR);
+    gtk_image_set_from_pixbuf(back.gobj(),sized->gobj());
+    //Release Memory
+    pixbuf.reset();
+    sized.reset();
+    //Show all children
+    show_all_children();
+}
+
+void MyWin::btnback_clicked(){
+    Gtk::FileChooserDialog dialog1("Choose an image file",
+                                  Gtk::FILE_CHOOSER_ACTION_OPEN);
+    dialog1.set_transient_for(*this);
+
+    //Add reponse buttons
+    dialog1.add_button("_Cancel",Gtk::RESPONSE_CANCEL);
+    dialog1.add_button("_OK",Gtk::RESPONSE_OK);
+    
+    //Add filters
+    auto filter_image=Gtk::FileFilter::create();
+    filter_image->set_name("Image Files");
+    filter_image->add_mime_type("image/*");
+    dialog1.add_filter(filter_image);
+
+    auto filter_any = Gtk::FileFilter::create();
+    filter_any->set_name("Any files");
+    filter_any->add_pattern("*");
+    dialog1.add_filter(filter_any);
+
+    //Show the dialog and wait for a user response:
+    int result = dialog1.run();
+
+    if(result=Gtk::RESPONSE_OK){
+        //Get the image file and set the image from the file
+        std::string filename;
+        filename=dialog1.get_filename();
+        Glib::RefPtr<Gdk::Pixbuf> pixbuf=Gdk::Pixbuf::create_from_file(filename);
+        Glib::RefPtr<Gdk::Pixbuf> sized=pixbuf->scale_simple(640,360,Gdk::INTERP_BILINEAR);
+        gtk_image_set_from_pixbuf(back.gobj(),sized->gobj());
+        //Free the memory
+        pixbuf.reset();
+        sized.reset();
+    }
+    filter_image.reset();
+    filter_any.reset();
+}
+
+MyWin::~MyWin(){
+}
diff --git a/Gtkmm3/gtk79_livetest/src/MyWin.hh b/Gtkmm3/gtk79_livetest/src/MyWin.hh
new file mode 100644
index 0000000..99bec9b
--- /dev/null
+++ b/Gtkmm3/gtk79_livetest/src/MyWin.hh
@@ -0,0 +1,16 @@
+#pragma once
+
+#include <gtkmm.h>
+
+class MyWin : public Gtk::Window{
+public:
+    MyWin();
+    virtual ~MyWin();
+protected:
+    //Signal handlers
+    void btnback_clicked();
+    //Child widgets
+    Gtk::Overlay overlay;
+    Gtk::Image back;
+    Gtk::Button btn_back;
+};
diff --git a/Gtkmm3/gtk79_livetest/src/main.cc b/Gtkmm3/gtk79_livetest/src/main.cc
new file mode 100644
index 0000000..0c49a3a
--- /dev/null
+++ b/Gtkmm3/gtk79_livetest/src/main.cc
@@ -0,0 +1,7 @@
+#include "MyWin.hh"
+
+int main(int argc,char **argv){
+    auto app=Gtk::Application::create(argc,argv,"org.gtk.daleclack");
+    MyWin window;
+    return app->run(window);
+}
\ No newline at end of file