diff --git a/GCR_CMake b/GCR_CMake
index c39fdec..b5a7fe5 160000
--- a/GCR_CMake
+++ b/GCR_CMake
@@ -1 +1 @@
-Subproject commit c39fdece33041c8028acc6cb90455019c35dae17
+Subproject commit b5a7fe5719ed0df8998b2ba961e09d967a385ec6
diff --git a/Gtk4/gtk114_UI4_test/.vscode/settings.json b/Gtk4/gtk114_UI4_test/.vscode/settings.json
new file mode 100644
index 0000000..b4d8c35
--- /dev/null
+++ b/Gtk4/gtk114_UI4_test/.vscode/settings.json
@@ -0,0 +1,3 @@
+{
+    "C_Cpp.default.configurationProvider": "ms-vscode.cmake-tools"
+}
\ No newline at end of file
diff --git a/Gtk4/gtk114_UI4_test/CMakeLists.txt b/Gtk4/gtk114_UI4_test/CMakeLists.txt
new file mode 100644
index 0000000..9167335
--- /dev/null
+++ b/Gtk4/gtk114_UI4_test/CMakeLists.txt
@@ -0,0 +1,39 @@
+set(CMAKE_CXX_STANDARD 17)
+cmake_minimum_required(VERSION 3.0.0)
+project(gtk114 VERSION 1.0.0)
+
+include(CTest)
+enable_testing()
+
+set(CPACK_PROJECT_NAME ${PROJECT_NAME})
+set(CPACK_PROJECT_VERSION ${PROJECT_VERSION})
+
+include(CPack)
+include_directories(.)
+include_directories(..)
+
+find_package (PkgConfig REQUIRED)
+pkg_check_modules (GTK4 REQUIRED gtk4)
+include_directories (${GTK4_INCLUDE_DIRS})
+link_directories (${GTK4_LIBRARY_DIRS})
+
+set(SOURCES src/main.cpp)
+
+# Step 4:Add the resource to compile list and compile
+if(WIN32)
+    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} ${SOURCES} ${RESOURCE_FILE})
+else()
+    add_executable(${PROJECT_NAME} ${SOURCES} ${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 ${GTK4_CFLAGS_OTHER})
+target_link_libraries (${PROJECT_NAME} ${GTK4_LIBRARIES} -lpthread -lm)
diff --git a/Gtk4/gtk114_UI4_test/src/main.cpp b/Gtk4/gtk114_UI4_test/src/main.cpp
new file mode 100644
index 0000000..3c0d49a
--- /dev/null
+++ b/Gtk4/gtk114_UI4_test/src/main.cpp
@@ -0,0 +1,38 @@
+#include <gtk/gtk.h>
+
+static void btnstate_clicked(GtkWidget * widget,gpointer data){
+    GdkSurface * surface = gtk_native_get_surface(GTK_NATIVE(data));
+    GdkToplevelState state = gdk_toplevel_get_state(GDK_TOPLEVEL(surface));
+    g_print("%d",state);
+}
+
+static void gtkmain(GtkApplication * app,gpointer user_data){
+    GtkWidget * window, * vbox, * label_state, * btn_state;
+    //Initalize Window
+    window = gtk_application_window_new(app);
+    gtk_window_set_icon_name(GTK_WINDOW(window),"org.gtk.daleclack");
+    gtk_window_set_default_size(GTK_WINDOW(window),300,200);
+
+    GtkWidget * win = gtk_window_new();
+    
+    //Add Widgets
+    vbox = gtk_box_new(GTK_ORIENTATION_VERTICAL,5);
+    gtk_widget_set_halign(vbox,GTK_ALIGN_CENTER);
+    gtk_widget_set_valign(vbox,GTK_ALIGN_CENTER);
+    label_state = gtk_label_new("");
+    gtk_box_append(GTK_BOX(vbox),label_state);
+    btn_state = gtk_button_new_with_label("Get Window State");
+    g_signal_connect(btn_state,"clicked",G_CALLBACK(btnstate_clicked),win);
+    gtk_box_append(GTK_BOX(vbox),btn_state);
+
+    gtk_window_set_child(GTK_WINDOW(window),vbox);
+    gtk_widget_show(window);
+    gtk_widget_show(win);
+}
+
+int main(int argc,char **argv){
+    GtkApplication * app;
+    app = gtk_application_new("org.gtk.daleclack",G_APPLICATION_NON_UNIQUE);
+    g_signal_connect(app,"activate",G_CALLBACK(gtkmain),NULL);
+    return g_application_run(G_APPLICATION(app),argc,argv);
+}
\ No newline at end of file
diff --git a/cpp/algorithms/problem1.cpp b/cpp/algorithms/problem1.cpp
new file mode 100644
index 0000000..e69de29