diff --git a/Gtk4/gtk120_music_res/CMakeLists.txt b/Gtk4/gtk120_music_res/CMakeLists.txt
index 16e6b96..25bfee4 100644
--- a/Gtk4/gtk120_music_res/CMakeLists.txt
+++ b/Gtk4/gtk120_music_res/CMakeLists.txt
@@ -1,6 +1,6 @@
set(CMAKE_CXX_STANDARD 17)
cmake_minimum_required(VERSION 3.0.0)
-project(gtk118 VERSION 1.0.0)
+project(gtk120 VERSION 1.0.0)
list(APPEND CMAKE_MODULE_PATH ${PROJECT_SOURCE_DIR}/../../GCR_CMake/macros)
include(GlibCompileResourcesSupport)
diff --git a/Gtkmm3/gtk121_launchpad/.vscode/settings.json b/Gtkmm3/gtk121_launchpad/.vscode/settings.json
new file mode 100644
index 0000000..b4d8c35
--- /dev/null
+++ b/Gtkmm3/gtk121_launchpad/.vscode/settings.json
@@ -0,0 +1,3 @@
+{
+ "C_Cpp.default.configurationProvider": "ms-vscode.cmake-tools"
+}
\ No newline at end of file
diff --git a/Gtkmm3/gtk121_launchpad/CMakeLists.txt b/Gtkmm3/gtk121_launchpad/CMakeLists.txt
new file mode 100644
index 0000000..94130d3
--- /dev/null
+++ b/Gtkmm3/gtk121_launchpad/CMakeLists.txt
@@ -0,0 +1,58 @@
+set(CMAKE_CXX_STANDARD 17)
+cmake_minimum_required(VERSION 3.0.0)
+project(gtk119 VERSION 1.0.0)
+
+list(APPEND CMAKE_MODULE_PATH ${PROJECT_SOURCE_DIR}/../../GCR_CMake/macros)
+include(GlibCompileResourcesSupport)
+
+include(CTest)
+enable_testing()
+
+set(CPACK_PROJECT_NAME ${PROJECT_NAME})
+set(CPACK_PROJECT_VERSION ${PROJECT_VERSION})
+
+include(CPack)
+include_directories(.)
+include_directories(..)
+
+find_package (PkgConfig REQUIRED)
+pkg_check_modules (GTKMM3 REQUIRED gtkmm-3.0)
+include_directories (${GTKMM3_INCLUDE_DIRS})
+link_directories (${GTKMM3_LIBRARY_DIRS})
+
+#Compile Resource
+
+set(RESOURCE_LIST
+ stack.ui)
+
+compile_gresources(RESOURCE_FILE
+ XML_OUT
+ TYPE EMBED_C
+ RESOURCES ${RESOURCE_LIST}
+ PREFIX "/org/gtk/daleclack"
+ SOURCE_DIR ${PROJECT_SOURCE_DIR}/res)
+
+# Add a custom target to the makefile. Now make builds our resource file.
+# It depends on the output RESOURCE_FILE.
+add_custom_target(resource ALL DEPENDS ${RESOURCE_FILE})
+
+#For win32 platform,use rc resource and .ico icon
+if(WIN32)
+ SET(CMAKE_RC_COMPILER x86_64-w64-mingw32-windres)
+ set(app_WINRC ../icon.rc)
+ set_property(SOURCE ../icon.rc APPEND PROPERTY
+ OBJECT_DEPENDS ${PROJECT_SOURCE_DIR}/../icon.ico
+ )
+ add_executable(${PROJECT_NAME} WIN32 ${app_WINRC} src/main.cc src/MyWin.cc ${RESOURCE_FILE})
+else()
+ add_executable(${PROJECT_NAME} src/main.cc src/MyWin.cc ${RESOURCE_FILE})
+
+endif(WIN32)
+
+#Add command to generate .gitignore
+add_custom_command(TARGET ${PROJECT_NAME}
+ COMMAND echo \"*\" > ${CMAKE_BINARY_DIR}/.gitignore
+ COMMAND echo \"**/*\" > ${CMAKE_BINARY_DIR}/.hgignore)
+
+SET (CMAKE_EXTRA_CXX_FLAGS ${GTKMM3_CFLAGS_OTHER})
+target_link_libraries (${PROJECT_NAME} ${GTKMM3_LIBRARIES} -lpthread)
diff --git a/Gtkmm3/gtk121_launchpad/res/stack.ui b/Gtkmm3/gtk121_launchpad/res/stack.ui
new file mode 100644
index 0000000..8b19fc9
--- /dev/null
+++ b/Gtkmm3/gtk121_launchpad/res/stack.ui
@@ -0,0 +1,112 @@
+
+
+
+
+
+
diff --git a/Gtkmm3/gtk121_launchpad/src/MyWin.cc b/Gtkmm3/gtk121_launchpad/src/MyWin.cc
new file mode 100644
index 0000000..342479e
--- /dev/null
+++ b/Gtkmm3/gtk121_launchpad/src/MyWin.cc
@@ -0,0 +1,36 @@
+#include "MyWin.hh"
+
+MyWin *MyWin::create()
+{
+ MyWin *win = nullptr;
+
+ auto builder1 = Gtk::Builder::create_from_resource("/org/gtk/daleclack/stack.ui");
+ builder1->get_widget_derived("window", win);
+ win->set_icon_name("org.gtk.daleclack");
+
+ return win;
+}
+
+MyWin::MyWin(BaseObjectType *cobject, const Glib::RefPtr &builder)
+ : Gtk::Window(cobject),
+ ref_builder(builder)
+{
+ //Get Widgets
+ ref_builder->get_widget("btn_go",btn_go);
+ ref_builder->get_widget("btn_back",btn_back);
+ ref_builder->get_widget("start_grid",start_grid);
+ ref_builder->get_widget("test_grid",test_grid);
+ ref_builder->get_widget("main_stack",main_stack);
+
+ //Link Signals
+ btn_go->signal_clicked().connect(sigc::mem_fun(*this,&MyWin::btngo_clicked));
+ btn_back->signal_clicked().connect(sigc::mem_fun(*this,&MyWin::btnback_clicked));
+}
+
+void MyWin::btngo_clicked(){
+ main_stack->set_visible_child(*test_grid);
+}
+
+void MyWin::btnback_clicked(){
+ main_stack->set_visible_child(*start_grid);
+}
diff --git a/Gtkmm3/gtk121_launchpad/src/MyWin.hh b/Gtkmm3/gtk121_launchpad/src/MyWin.hh
new file mode 100644
index 0000000..02424eb
--- /dev/null
+++ b/Gtkmm3/gtk121_launchpad/src/MyWin.hh
@@ -0,0 +1,23 @@
+#pragma once
+
+#include
+
+class MyWin : public Gtk::Window
+{
+public:
+ static MyWin *create();
+ MyWin(BaseObjectType *cobject, const Glib::RefPtr &builder);
+
+private:
+ Glib::RefPtr ref_builder;
+
+ // Child Widgets
+ Gtk::Button *btn_go, *btn_back;
+ Gtk::Grid *start_grid, *test_grid;
+ Gtk::Stack *main_stack;
+
+ //Signal Handlers
+ void btngo_clicked();
+ void btnback_clicked();
+
+};
diff --git a/Gtkmm3/gtk121_launchpad/src/main.cc b/Gtkmm3/gtk121_launchpad/src/main.cc
new file mode 100644
index 0000000..90e67ee
--- /dev/null
+++ b/Gtkmm3/gtk121_launchpad/src/main.cc
@@ -0,0 +1,8 @@
+#include "MyWin.hh"
+
+int main(int argc,char ** argv){
+ //Create a application and run
+ auto app = Gtk::Application::create(argc,argv,"org.gtk.daleclack");
+ auto win = MyWin::create();
+ return app->run(*win);
+}