diff --git a/Tutorial/GacUI_Windows/GacUI_Windows.sln b/Tutorial/GacUI_Windows/GacUI_Windows.sln
index 2b365dad..6e851df1 100644
--- a/Tutorial/GacUI_Windows/GacUI_Windows.sln
+++ b/Tutorial/GacUI_Windows/GacUI_Windows.sln
@@ -9,6 +9,8 @@ Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "Lib", "Lib", "{A9A7E9AB-319
 EndProject
 Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "GacUILite", "..\Lib\GacUILite\GacUILite.vcxproj", "{96C559CA-9718-4BEC-A053-28A0AB6A8CA2}"
 EndProject
+Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "WindowIcon", "WindowIcon\WindowIcon.vcxproj", "{05144B92-0CDF-4E81-A151-413305E40CE9}"
+EndProject
 Global
 	GlobalSection(SolutionConfigurationPlatforms) = preSolution
 		Debug|Win32 = Debug|Win32
@@ -31,6 +33,14 @@ Global
 		{96C559CA-9718-4BEC-A053-28A0AB6A8CA2}.Release|Win32.ActiveCfg = Release|Win32
 		{96C559CA-9718-4BEC-A053-28A0AB6A8CA2}.Release|Win32.Build.0 = Release|Win32
 		{96C559CA-9718-4BEC-A053-28A0AB6A8CA2}.Release|x64.ActiveCfg = Release|Win32
+		{05144B92-0CDF-4E81-A151-413305E40CE9}.Debug|Win32.ActiveCfg = Debug|Win32
+		{05144B92-0CDF-4E81-A151-413305E40CE9}.Debug|Win32.Build.0 = Debug|Win32
+		{05144B92-0CDF-4E81-A151-413305E40CE9}.Debug|x64.ActiveCfg = Debug|x64
+		{05144B92-0CDF-4E81-A151-413305E40CE9}.Debug|x64.Build.0 = Debug|x64
+		{05144B92-0CDF-4E81-A151-413305E40CE9}.Release|Win32.ActiveCfg = Release|Win32
+		{05144B92-0CDF-4E81-A151-413305E40CE9}.Release|Win32.Build.0 = Release|Win32
+		{05144B92-0CDF-4E81-A151-413305E40CE9}.Release|x64.ActiveCfg = Release|x64
+		{05144B92-0CDF-4E81-A151-413305E40CE9}.Release|x64.Build.0 = Release|x64
 	EndGlobalSection
 	GlobalSection(SolutionProperties) = preSolution
 		HideSolutionNode = FALSE
diff --git a/Tutorial/GacUI_Windows/WindowIcon/Main.cpp b/Tutorial/GacUI_Windows/WindowIcon/Main.cpp
new file mode 100644
index 00000000..e69de29b
diff --git a/Tutorial/GacUI_Windows/WindowIcon/New.ico b/Tutorial/GacUI_Windows/WindowIcon/New.ico
new file mode 100644
index 00000000..c359a29a
Binary files /dev/null and b/Tutorial/GacUI_Windows/WindowIcon/New.ico differ
diff --git a/Tutorial/GacUI_Windows/WindowIcon/Resource.rc b/Tutorial/GacUI_Windows/WindowIcon/Resource.rc
new file mode 100644
index 00000000..cdacf0ba
Binary files /dev/null and b/Tutorial/GacUI_Windows/WindowIcon/Resource.rc differ
diff --git a/Tutorial/GacUI_Windows/WindowIcon/UI/Annotate_Default.ico b/Tutorial/GacUI_Windows/WindowIcon/UI/Annotate_Default.ico
new file mode 100644
index 00000000..7caf85f4
Binary files /dev/null and b/Tutorial/GacUI_Windows/WindowIcon/UI/Annotate_Default.ico differ
diff --git a/Tutorial/GacUI_Windows/WindowIcon/UI/Resource.xml b/Tutorial/GacUI_Windows/WindowIcon/UI/Resource.xml
new file mode 100644
index 00000000..3777c980
--- /dev/null
+++ b/Tutorial/GacUI_Windows/WindowIcon/UI/Resource.xml
@@ -0,0 +1,46 @@
+<Resource>
+  <Folder name="GacGenConfig">
+    <Folder name="Cpp">
+      <Text name="SourceFolder">Source</Text>
+      <Text name="Resource">..\..\UIRes\WindowIcon.bin</Text>
+      <Text name="NormalInclude">GacUI.h</Text>
+      <Text name="ReflectionInclude">GacUIReflection.h</Text>
+      <Text name="Name">Demo</Text>
+    </Folder>
+  </Folder>
+
+  <Folder name="Images">
+    <Image name="CustomIcon" content="File">Annotate_Default.ico</Image>
+  </Folder>
+
+  <Instance name="MainWindowResource">
+    <Instance ref.CodeBehind="true" ref.Class="demo::MainWindow">
+      <ref.Members>
+        <![CDATA[
+          prop CustomIcon : GuiImageData^ = null {}
+        ]]>
+      </ref.Members>
+      <Window ref.Name="self" Text="WindowIcon" ClientSize="x:640 y:480" TopMost="true" IconVisible-bind="checkVisible.Selected" Icon-bind="checkCustom.Selected ? self.CustomIcon : null" CustomIcon-uri="res://Images/CustomIcon">
+        <Stack AlignmentToParent="left:10 top:10 right:-1 bottom:-1" MinSizeLimitation="LimitToElementAndChildren" Direction="Vertical">
+          <StackItem>
+            <CheckBox ref.Name="checkVisible" Text="Icon Visible" Selected="true"/>
+          </StackItem>
+          <StackItem>
+            <CheckBox ref.Name="checkCustom" Text="Custom Icon" Selected="false"/>
+          </StackItem>
+          <StackItem>
+            <Button Text="Create another copy">
+              <ev.Clicked-eval>
+                <![CDATA[
+                  {
+                    new MainWindow*().ShowModalAndDelete(self, func():void{});
+                  }
+                ]]>
+              </ev.Clicked-eval>
+            </Button>
+          </StackItem>
+        </Stack>
+      </Window>
+    </Instance>
+  </Instance>
+</Resource>
\ No newline at end of file
diff --git a/Tutorial/GacUI_Windows/WindowIcon/WindowIcon.vcxproj b/Tutorial/GacUI_Windows/WindowIcon/WindowIcon.vcxproj
new file mode 100644
index 00000000..6acdf81d
--- /dev/null
+++ b/Tutorial/GacUI_Windows/WindowIcon/WindowIcon.vcxproj
@@ -0,0 +1,164 @@
+<?xml version="1.0" encoding="utf-8"?>
+<Project DefaultTargets="Build" ToolsVersion="15.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+  <ItemGroup Label="ProjectConfigurations">
+    <ProjectConfiguration Include="Debug|Win32">
+      <Configuration>Debug</Configuration>
+      <Platform>Win32</Platform>
+    </ProjectConfiguration>
+    <ProjectConfiguration Include="Release|Win32">
+      <Configuration>Release</Configuration>
+      <Platform>Win32</Platform>
+    </ProjectConfiguration>
+    <ProjectConfiguration Include="Debug|x64">
+      <Configuration>Debug</Configuration>
+      <Platform>x64</Platform>
+    </ProjectConfiguration>
+    <ProjectConfiguration Include="Release|x64">
+      <Configuration>Release</Configuration>
+      <Platform>x64</Platform>
+    </ProjectConfiguration>
+  </ItemGroup>
+  <PropertyGroup Label="Globals">
+    <VCProjectVersion>15.0</VCProjectVersion>
+    <ProjectGuid>{05144B92-0CDF-4E81-A151-413305E40CE9}</ProjectGuid>
+    <Keyword>Win32Proj</Keyword>
+    <RootNamespace>WindowIcon</RootNamespace>
+    <WindowsTargetPlatformVersion>10.0.17134.0</WindowsTargetPlatformVersion>
+  </PropertyGroup>
+  <Import Project="$(VCTargetsPath)\Microsoft.Cpp.Default.props" />
+  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'" Label="Configuration">
+    <ConfigurationType>Application</ConfigurationType>
+    <UseDebugLibraries>true</UseDebugLibraries>
+    <PlatformToolset>v141</PlatformToolset>
+    <CharacterSet>Unicode</CharacterSet>
+  </PropertyGroup>
+  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|Win32'" Label="Configuration">
+    <ConfigurationType>Application</ConfigurationType>
+    <UseDebugLibraries>false</UseDebugLibraries>
+    <PlatformToolset>v141</PlatformToolset>
+    <WholeProgramOptimization>true</WholeProgramOptimization>
+    <CharacterSet>Unicode</CharacterSet>
+  </PropertyGroup>
+  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|x64'" Label="Configuration">
+    <ConfigurationType>Application</ConfigurationType>
+    <UseDebugLibraries>true</UseDebugLibraries>
+    <PlatformToolset>v141</PlatformToolset>
+    <CharacterSet>Unicode</CharacterSet>
+  </PropertyGroup>
+  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|x64'" Label="Configuration">
+    <ConfigurationType>Application</ConfigurationType>
+    <UseDebugLibraries>false</UseDebugLibraries>
+    <PlatformToolset>v141</PlatformToolset>
+    <WholeProgramOptimization>true</WholeProgramOptimization>
+    <CharacterSet>Unicode</CharacterSet>
+  </PropertyGroup>
+  <Import Project="$(VCTargetsPath)\Microsoft.Cpp.props" />
+  <ImportGroup Label="ExtensionSettings">
+  </ImportGroup>
+  <ImportGroup Label="Shared">
+  </ImportGroup>
+  <ImportGroup Label="PropertySheets" Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">
+    <Import Project="$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props" Condition="exists('$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props')" Label="LocalAppDataPlatform" />
+  </ImportGroup>
+  <ImportGroup Label="PropertySheets" Condition="'$(Configuration)|$(Platform)'=='Release|Win32'">
+    <Import Project="$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props" Condition="exists('$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props')" Label="LocalAppDataPlatform" />
+  </ImportGroup>
+  <ImportGroup Label="PropertySheets" Condition="'$(Configuration)|$(Platform)'=='Debug|x64'">
+    <Import Project="$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props" Condition="exists('$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props')" Label="LocalAppDataPlatform" />
+  </ImportGroup>
+  <ImportGroup Label="PropertySheets" Condition="'$(Configuration)|$(Platform)'=='Release|x64'">
+    <Import Project="$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props" Condition="exists('$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props')" Label="LocalAppDataPlatform" />
+  </ImportGroup>
+  <PropertyGroup Label="UserMacros" />
+  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">
+    <LinkIncremental>true</LinkIncremental>
+  </PropertyGroup>
+  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|x64'">
+    <LinkIncremental>true</LinkIncremental>
+  </PropertyGroup>
+  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|Win32'">
+    <LinkIncremental>false</LinkIncremental>
+  </PropertyGroup>
+  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|x64'">
+    <LinkIncremental>false</LinkIncremental>
+  </PropertyGroup>
+  <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">
+    <ClCompile>
+      <WarningLevel>Level3</WarningLevel>
+      <Optimization>Disabled</Optimization>
+      <SDLCheck>true</SDLCheck>
+      <PreprocessorDefinitions>WIN32;_DEBUG;_WINDOWS;%(PreprocessorDefinitions)</PreprocessorDefinitions>
+      <ConformanceMode>true</ConformanceMode>
+    </ClCompile>
+    <Link>
+      <GenerateDebugInformation>true</GenerateDebugInformation>
+      <SubSystem>Windows</SubSystem>
+    </Link>
+  </ItemDefinitionGroup>
+  <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Debug|x64'">
+    <ClCompile>
+      <WarningLevel>Level3</WarningLevel>
+      <Optimization>Disabled</Optimization>
+      <SDLCheck>true</SDLCheck>
+      <PreprocessorDefinitions>_DEBUG;_WINDOWS;%(PreprocessorDefinitions)</PreprocessorDefinitions>
+      <ConformanceMode>true</ConformanceMode>
+    </ClCompile>
+    <Link>
+      <GenerateDebugInformation>true</GenerateDebugInformation>
+      <SubSystem>Windows</SubSystem>
+    </Link>
+  </ItemDefinitionGroup>
+  <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Release|Win32'">
+    <ClCompile>
+      <WarningLevel>Level3</WarningLevel>
+      <Optimization>MaxSpeed</Optimization>
+      <FunctionLevelLinking>true</FunctionLevelLinking>
+      <IntrinsicFunctions>true</IntrinsicFunctions>
+      <SDLCheck>true</SDLCheck>
+      <PreprocessorDefinitions>WIN32;NDEBUG;_WINDOWS;%(PreprocessorDefinitions)</PreprocessorDefinitions>
+      <ConformanceMode>true</ConformanceMode>
+    </ClCompile>
+    <Link>
+      <EnableCOMDATFolding>true</EnableCOMDATFolding>
+      <OptimizeReferences>true</OptimizeReferences>
+      <GenerateDebugInformation>true</GenerateDebugInformation>
+      <SubSystem>Windows</SubSystem>
+    </Link>
+  </ItemDefinitionGroup>
+  <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Release|x64'">
+    <ClCompile>
+      <WarningLevel>Level3</WarningLevel>
+      <Optimization>MaxSpeed</Optimization>
+      <FunctionLevelLinking>true</FunctionLevelLinking>
+      <IntrinsicFunctions>true</IntrinsicFunctions>
+      <SDLCheck>true</SDLCheck>
+      <PreprocessorDefinitions>NDEBUG;_WINDOWS;%(PreprocessorDefinitions)</PreprocessorDefinitions>
+      <ConformanceMode>true</ConformanceMode>
+    </ClCompile>
+    <Link>
+      <EnableCOMDATFolding>true</EnableCOMDATFolding>
+      <OptimizeReferences>true</OptimizeReferences>
+      <GenerateDebugInformation>true</GenerateDebugInformation>
+      <SubSystem>Windows</SubSystem>
+    </Link>
+  </ItemDefinitionGroup>
+  <ItemGroup>
+    <ClCompile Include="Main.cpp" />
+  </ItemGroup>
+  <ItemGroup>
+    <Xml Include="UI\Resource.xml" />
+  </ItemGroup>
+  <ItemGroup>
+    <Image Include="New.ico" />
+    <Image Include="UI\Annotate_Default.ico" />
+  </ItemGroup>
+  <ItemGroup>
+    <ClInclude Include="resource.h" />
+  </ItemGroup>
+  <ItemGroup>
+    <ResourceCompile Include="Resource.rc" />
+  </ItemGroup>
+  <Import Project="$(VCTargetsPath)\Microsoft.Cpp.targets" />
+  <ImportGroup Label="ExtensionTargets">
+  </ImportGroup>
+</Project>
\ No newline at end of file
diff --git a/Tutorial/GacUI_Windows/WindowIcon/WindowIcon.vcxproj.filters b/Tutorial/GacUI_Windows/WindowIcon/WindowIcon.vcxproj.filters
new file mode 100644
index 00000000..cb87c020
--- /dev/null
+++ b/Tutorial/GacUI_Windows/WindowIcon/WindowIcon.vcxproj.filters
@@ -0,0 +1,51 @@
+<?xml version="1.0" encoding="utf-8"?>
+<Project ToolsVersion="4.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+  <ItemGroup>
+    <Filter Include="Source Files">
+      <UniqueIdentifier>{4FC737F1-C7A5-4376-A066-2A32D752A2FF}</UniqueIdentifier>
+      <Extensions>cpp;c;cc;cxx;def;odl;idl;hpj;bat;asm;asmx</Extensions>
+    </Filter>
+    <Filter Include="Header Files">
+      <UniqueIdentifier>{93995380-89BD-4b04-88EB-625FBE52EBFB}</UniqueIdentifier>
+      <Extensions>h;hh;hpp;hxx;hm;inl;inc;ipp;xsd</Extensions>
+    </Filter>
+    <Filter Include="Resource Files">
+      <UniqueIdentifier>{67DA6AB6-F800-4c08-8B7A-83BB121AAD01}</UniqueIdentifier>
+      <Extensions>rc;ico;cur;bmp;dlg;rc2;rct;bin;rgs;gif;jpg;jpeg;jpe;resx;tiff;tif;png;wav;mfcribbon-ms</Extensions>
+    </Filter>
+    <Filter Include="Icon">
+      <UniqueIdentifier>{147830a0-17a4-47de-87fe-afed9d3c93b5}</UniqueIdentifier>
+    </Filter>
+    <Filter Include="UI">
+      <UniqueIdentifier>{fe201c2d-4f36-4de6-9abc-b40d78d605fb}</UniqueIdentifier>
+    </Filter>
+  </ItemGroup>
+  <ItemGroup>
+    <ClCompile Include="Main.cpp">
+      <Filter>Source Files</Filter>
+    </ClCompile>
+  </ItemGroup>
+  <ItemGroup>
+    <Xml Include="UI\Resource.xml">
+      <Filter>Resource Files</Filter>
+    </Xml>
+  </ItemGroup>
+  <ItemGroup>
+    <Image Include="New.ico">
+      <Filter>Icon</Filter>
+    </Image>
+    <Image Include="UI\Annotate_Default.ico">
+      <Filter>Resource Files</Filter>
+    </Image>
+  </ItemGroup>
+  <ItemGroup>
+    <ClInclude Include="resource.h">
+      <Filter>Icon</Filter>
+    </ClInclude>
+  </ItemGroup>
+  <ItemGroup>
+    <ResourceCompile Include="Resource.rc">
+      <Filter>Icon</Filter>
+    </ResourceCompile>
+  </ItemGroup>
+</Project>
\ No newline at end of file
diff --git a/Tutorial/GacUI_Windows/WindowIcon/resource.h b/Tutorial/GacUI_Windows/WindowIcon/resource.h
new file mode 100644
index 00000000..c7663c78
--- /dev/null
+++ b/Tutorial/GacUI_Windows/WindowIcon/resource.h
@@ -0,0 +1,16 @@
+//{{NO_DEPENDENCIES}}
+// Microsoft Visual C++ generated include file.
+// Used by Resource.rc
+//
+#define MAINICON                       101
+
+// Next default values for new objects
+// 
+#ifdef APSTUDIO_INVOKED
+#ifndef APSTUDIO_READONLY_SYMBOLS
+#define _APS_NEXT_RESOURCE_VALUE        104
+#define _APS_NEXT_COMMAND_VALUE         40001
+#define _APS_NEXT_CONTROL_VALUE         1001
+#define _APS_NEXT_SYMED_VALUE           101
+#endif
+#endif