diff --git a/CMakeLists.txt b/CMakeLists.txt
index 24da5a30..40225c5b 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -2,9 +2,21 @@ cmake_minimum_required(VERSION 3.20)
 
 project(FluentUI VERSION 0.1 LANGUAGES CXX)
 
-add_subdirectory(src)
-add_subdirectory(example)
+option(FLUENTUI_BUILD_EXAMPLES "Build FluentUI demo applications." ON)
+option(FLUENTUI_BUILD_FRAMELESSHEPLER "Build FramelessHelper." ON)
 
-add_definitions(-DFRAMELESSHELPER_CORE_NO_DEBUG_OUTPUT)
-add_definitions(-DFRAMELESSHELPER_QUICK_NO_DEBUG_OUTPUT)
-add_subdirectory(framelesshelper)
+add_subdirectory(src)
+
+if (FLUENTUI_BUILD_EXAMPLES)
+    add_subdirectory(example)
+endif ()
+
+if (FLUENTUI_BUILD_FRAMELESSHEPLER)
+    add_definitions(-DFRAMELESSHELPER_CORE_NO_DEBUG_OUTPUT)
+    add_definitions(-DFRAMELESSHELPER_QUICK_NO_DEBUG_OUTPUT)
+    add_subdirectory(framelesshelper)
+endif ()
+
+message("------------------------ FluentUI ------------------------")
+message("Build FluentUI demo applications.: ${FLUENTUI_BUILD_EXAMPLES}")
+message("Build FramelessHelper.: ${FLUENTUI_BUILD_FRAMELESSHEPLER}")
diff --git a/src/imports/FluentUI/Controls/FluAppBar.qml b/src/imports/FluentUI/Controls/FluAppBar.qml
index 8319e519..51e2c7ae 100644
--- a/src/imports/FluentUI/Controls/FluAppBar.qml
+++ b/src/imports/FluentUI/Controls/FluAppBar.qml
@@ -147,4 +147,8 @@ Rectangle{
         return btn_close
     }
 
+    function darkButton(){
+        return btn_dark
+    }
+
 }