diff --git a/backend_test/example_glfw_opengl3/CmakeLists.txt b/backend_test/example_glfw_opengl3/CmakeLists.txt
index 113ae0f..b64ee0b 100644
--- a/backend_test/example_glfw_opengl3/CmakeLists.txt
+++ b/backend_test/example_glfw_opengl3/CmakeLists.txt
@@ -1,96 +1,103 @@
-Project(cmimgui_glfw)
-cmake_minimum_required(VERSION 3.1)
-if(WIN32) # to mingw work as all the others
-	set(CMAKE_SHARED_LIBRARY_PREFIX "")
-endif(WIN32)
-
-set (CMAKE_CXX_STANDARD 11)
-
-# general settings
-if (EXISTS ${CMAKE_CURRENT_SOURCE_DIR}/../../imgui/backends)
-	set(BAKENDS_FOLDER "../../imgui/backends/")
-else()
-	set(BAKENDS_FOLDER "../../imgui/examples/")
-endif()
-
-if (EXISTS ${CMAKE_CURRENT_SOURCE_DIR}/../../imgui/imgui_tables.cpp)
-	set(TABLES_SOURCE "../../imgui/imgui_tables.cpp")
-else()
-	set(TABLES_SOURCE "")
-endif()
-
-include_directories(../../imgui)
-add_definitions("-DIMGUI_DISABLE_OBSOLETE_FUNCTIONS=1")
-
-include_directories(../../)
-set(IMGUI_SOURCES 
-../../cimgui.cpp 
-../../imgui/imgui.cpp 
-../../imgui/imgui_draw.cpp 
-../../imgui/imgui_demo.cpp 
-../../imgui/imgui_widgets.cpp
-${TABLES_SOURCE} 
-)
-
-set(IMGUI_SOURCES_sdl)
-set(IMGUI_LIBRARIES )
-
-if (WIN32)
-    add_definitions("-DIMGUI_IMPL_API=extern \"C\" __declspec\(dllexport\)")
-else(WIN32)
-    add_definitions("-DIMGUI_IMPL_API=extern \"C\" ")
-endif(WIN32)
-
-add_compile_definitions("IMGUI_IMPL_OPENGL_LOADER_GL3W")
-
-# optional adding freetype
-option(IMGUI_FREETYPE "add Freetype2" OFF)
-
-if(IMGUI_FREETYPE)
-	FIND_PACKAGE(freetype REQUIRED PATHS ${FREETYPE_PATH})
-	list(APPEND IMGUI_LIBRARIES freetype)
-	list(APPEND IMGUI_SOURCES ../../imgui/misc/freetype/imgui_freetype.cpp)
-	add_definitions("-DCIMGUI_FREETYPE=1")
-endif(IMGUI_FREETYPE)
-
-# opengl3
-list(APPEND IMGUI_SOURCES ${BAKENDS_FOLDER}imgui_impl_opengl3.cpp)
-include_directories(../../imgui/examples/libs/gl3w)
-if(WIN32)
-       list(APPEND IMGUI_LIBRARIES opengl32)
-else(WIN32) # Unix
-       list(APPEND IMGUI_LIBRARIES GL)
-endif(WIN32)
-
-# GLFW
-list(APPEND IMGUI_SOURCES ${BAKENDS_FOLDER}imgui_impl_glfw.cpp)
-find_package(glfw3 REQUIRED)
-
-# alternatively, you can build from source.
-# this tends to be quite the lifesaver on windows.
-# set(GLFW_BUILD_DOCS OFF CACHE BOOL "" FORCE)
-# set(GLFW_BUILD_TESTS OFF CACHE BOOL "" FORCE)
-# set(GLFW_BUILD_EXAMPLES OFF CACHE BOOL "" FORCE)
-# add_subdirectory(<path_to_glfw_source>)
-
-# imgui/glfw get confused if not statically built 
-# on windows.
-IF (WIN32)
-  add_library(cimgui STATIC ${IMGUI_SOURCES})
-ELSE()
-  add_library(cimgui SHARED ${IMGUI_SOURCES})
-ENDIF()
-
-target_link_libraries(cimgui ${IMGUI_LIBRARIES} glfw)
-
-
-# using library
-include_directories(../../generator/output/)
-add_executable(${PROJECT_NAME} main.c)
-target_compile_definitions(${PROJECT_NAME} PUBLIC -DCIMGUI_USE_OPENGL3 -DCIMGUI_USE_GLFW)
-if (MINGW)
-	target_link_options(${PROJECT_NAME} PRIVATE "-mconsole")
-endif()
-target_link_libraries(${PROJECT_NAME} ${IMGUI_SDL_LIBRARY} cimgui)
-
-
+Project(cmimgui_glfw)
+cmake_minimum_required(VERSION 3.11)
+if(WIN32) # to mingw work as all the others
+	set(CMAKE_SHARED_LIBRARY_PREFIX "")
+endif(WIN32)
+
+set (CMAKE_CXX_STANDARD 11)
+
+# general settings
+if (EXISTS ${CMAKE_CURRENT_SOURCE_DIR}/../../imgui/backends)
+	set(BAKENDS_FOLDER "../../imgui/backends/")
+else()
+	set(BAKENDS_FOLDER "../../imgui/examples/")
+endif()
+
+if (EXISTS ${CMAKE_CURRENT_SOURCE_DIR}/../../imgui/imgui_tables.cpp)
+	set(TABLES_SOURCE "../../imgui/imgui_tables.cpp")
+else()
+	set(TABLES_SOURCE "")
+endif()
+
+include_directories(../../imgui)
+add_definitions("-DIMGUI_DISABLE_OBSOLETE_FUNCTIONS=1")
+
+include_directories(../../)
+set(IMGUI_SOURCES 
+../../cimgui.cpp 
+../../imgui/imgui.cpp 
+../../imgui/imgui_draw.cpp 
+../../imgui/imgui_demo.cpp 
+../../imgui/imgui_widgets.cpp
+${TABLES_SOURCE} 
+)
+
+set(IMGUI_SOURCES_sdl)
+set(IMGUI_LIBRARIES )
+
+if (WIN32)
+    add_definitions("-DIMGUI_IMPL_API=extern \"C\" __declspec\(dllexport\)")
+else(WIN32)
+    add_definitions("-DIMGUI_IMPL_API=extern \"C\" ")
+endif(WIN32)
+
+add_compile_definitions("IMGUI_IMPL_OPENGL_LOADER_GL3W")
+
+# optional adding freetype
+option(IMGUI_FREETYPE "add Freetype2" OFF)
+
+if(IMGUI_FREETYPE)
+	FIND_PACKAGE(freetype REQUIRED PATHS ${FREETYPE_PATH})
+	list(APPEND IMGUI_LIBRARIES freetype)
+	list(APPEND IMGUI_SOURCES ../../imgui/misc/freetype/imgui_freetype.cpp)
+	add_definitions("-DCIMGUI_FREETYPE=1")
+endif(IMGUI_FREETYPE)
+
+# opengl3
+list(APPEND IMGUI_SOURCES ${BAKENDS_FOLDER}imgui_impl_opengl3.cpp)
+include_directories(../../imgui/examples/libs/gl3w)
+if(WIN32)
+       list(APPEND IMGUI_LIBRARIES opengl32)
+else(WIN32) # Unix
+       list(APPEND IMGUI_LIBRARIES GL)
+endif(WIN32)
+
+# GLFW
+list(APPEND IMGUI_SOURCES ${BAKENDS_FOLDER}imgui_impl_glfw.cpp)
+
+set(GLFW_VERSION 3.3.8)
+include(FetchContent)
+	FetchContent_Declare(
+    glfw
+    URL https://github.com/glfw/glfw/archive/refs/tags/${GLFW_VERSION}.tar.gz)
+
+FetchContent_GetProperties(glfw)
+if (NOT glfw_POPULATED)
+	set(FETCHCONTENT_QUIET NO)
+    FetchContent_Populate(glfw)
+	set(GLFW_BUILD_TESTS OFF CACHE BOOL "" FORCE)
+	set(GLFW_BUILD_EXAMPLES OFF CACHE BOOL "" FORCE)
+	add_subdirectory(${glfw_SOURCE_DIR} ${glfw_BINARY_DIR})
+endif()
+
+
+# glfw/imgui gets confused if it is not statically built.
+IF (WIN32)
+  add_library(cimgui STATIC ${IMGUI_SOURCES})
+ELSE()
+  add_library(cimgui SHARED ${IMGUI_SOURCES})
+ENDIF()
+
+target_link_libraries(cimgui ${IMGUI_LIBRARIES} glfw)
+
+
+# using library
+include_directories(../../generator/output/)
+add_executable(${PROJECT_NAME} main.c)
+target_compile_definitions(${PROJECT_NAME} PUBLIC -DCIMGUI_USE_OPENGL3 -DCIMGUI_USE_GLFW)
+if (MINGW)
+	target_link_options(${PROJECT_NAME} PRIVATE "-mconsole")
+endif()
+target_link_libraries(${PROJECT_NAME} ${IMGUI_SDL_LIBRARY} cimgui)
+
+