diff --git a/Tutorial/GacUI_Layout/RichTextEmbedding/Main.cpp b/Tutorial/GacUI_Layout/RichTextEmbedding/Main.cpp
index 1d01f21c..e14100d6 100644
--- a/Tutorial/GacUI_Layout/RichTextEmbedding/Main.cpp
+++ b/Tutorial/GacUI_Layout/RichTextEmbedding/Main.cpp
@@ -9,6 +9,15 @@ int CALLBACK WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, LPSTR lpCmdLi
 	return SetupWindowsDirect2DRenderer();
 }
 
+class ViewModel : public Object, public virtual demo::IViewModel
+{
+public:
+	void OpenUrl(WString url)override
+	{
+		ShellExecute(NULL, L"OPEN", url.Buffer(), NULL, NULL, SW_MAXIMIZE);
+	}
+};
+
 void GuiMain()
 {
 	{
@@ -17,7 +26,7 @@ void GuiMain()
 		auto resource = GuiResource::LoadPrecompiledBinary(fileStream, errors);
 		GetInstanceLoaderManager()->SetResource(L"Resource", resource);
 	}
-	demo::MainWindow window;
+	demo::MainWindow window(new ViewModel);
 	window.MoveToScreenCenter();
 	GetApplication()->Run(&window);
 }
\ No newline at end of file
diff --git a/Tutorial/GacUI_Layout/RichTextEmbedding/UI/MainWindow.xml b/Tutorial/GacUI_Layout/RichTextEmbedding/UI/MainWindow.xml
index 2910cf35..379d7b29 100644
--- a/Tutorial/GacUI_Layout/RichTextEmbedding/UI/MainWindow.xml
+++ b/Tutorial/GacUI_Layout/RichTextEmbedding/UI/MainWindow.xml
@@ -1,11 +1,15 @@
 <?xml version="1.0" encoding="utf-8"?>
 <Instance ref.CodeBehind="false" ref.Class="demo::MainWindow">
+  <ref.Parameter Name="ViewModel" Class="demo::IViewModel"/>
   <Window Text="RichTextEmbedding" ClientSize="x:480 y:320">
     <att.BoundsComposition-set PreferredMinSize="x:480 y:640"/>
     <att.ContainerComposition-set MinSizeLimitation="LimitToElementAndChildren"/>
 
-    <DocumentViewer EditMode="Selectable" Document-uri="res://EmbeddedDocument/Document">
+    <DocumentViewer ref.Name="documentViewer" EditMode="ViewOnly" Document-uri="res://EmbeddedDocument/Document">
       <att.BoundsComposition-set AlignmentToParent="left:5 top:5 right:5 bottom:5"/>
+      <ev.ActiveHyperlinkExecuted-eval>
+        ViewModel.OpenUrl(documentViewer.ActiveHyperlinkReference);
+      </ev.ActiveHyperlinkExecuted-eval>
       <DocumentItem Name="Button">
         <Button Text="Button"/>
       </DocumentItem>
diff --git a/Tutorial/GacUI_Layout/RichTextEmbedding/UI/Resource.xml b/Tutorial/GacUI_Layout/RichTextEmbedding/UI/Resource.xml
index efe1417a..40ce9cd8 100644
--- a/Tutorial/GacUI_Layout/RichTextEmbedding/UI/Resource.xml
+++ b/Tutorial/GacUI_Layout/RichTextEmbedding/UI/Resource.xml
@@ -17,6 +17,21 @@
     <Doc content="File" name="Document">Document.xml</Doc>
   </Folder>
   <Folder name="MainWindow">
+    <Script name="ViewModelResource">
+      <Workflow-ViewModel>
+        <![CDATA[
+          module viewmodel;
+          
+          namespace demo
+          {
+            interface IViewModel
+            {
+              func OpenUrl(url : string) : void;
+            }
+          }
+        ]]>
+      </Workflow-ViewModel>
+    </Script>
     <Instance content="File" name="MainWindowResource">MainWindow.xml</Instance>
   </Folder>
 </Resource>
\ No newline at end of file
diff --git a/Tutorial/GacUI_Layout/RichTextEmbedding/UI/Source/DemoPartialClasses.cpp b/Tutorial/GacUI_Layout/RichTextEmbedding/UI/Source/DemoPartialClasses.cpp
index aa0483a1..61230574 100644
--- a/Tutorial/GacUI_Layout/RichTextEmbedding/UI/Source/DemoPartialClasses.cpp
+++ b/Tutorial/GacUI_Layout/RichTextEmbedding/UI/Source/DemoPartialClasses.cpp
@@ -16,9 +16,9 @@ namespace demo
 
 	// #endregion CLASS_MEMBER_GUIEVENT_HANDLER
 
-	MainWindow::MainWindow()
+	MainWindow::MainWindow(Ptr<demo::IViewModel> ViewModel)
 	{
-		InitializeComponents();
+		InitializeComponents(ViewModel);
 	}
 
 	MainWindow::~MainWindow()
@@ -35,11 +35,19 @@ namespace vl
 		namespace description
 		{
 			#define _ ,
+			IMPL_CPP_TYPE_INFO(demo::IViewModel)
 			IMPL_CPP_TYPE_INFO(demo::MainWindow)
 
+			BEGIN_CLASS_MEMBER(demo::IViewModel)
+				CLASS_MEMBER_BASE(vl::reflection::IDescriptable)
+				CLASS_MEMBER_METHOD(OpenUrl, { L"url" });
+			END_CLASS_MEMBER(demo::IViewModel)
+
 			BEGIN_CLASS_MEMBER(demo::MainWindow)
 				CLASS_MEMBER_BASE(vl::presentation::controls::GuiWindow)
-				CLASS_MEMBER_CONSTRUCTOR(demo::MainWindow*(), NO_PARAMETER)
+				CLASS_MEMBER_CONSTRUCTOR(demo::MainWindow*(Ptr<demo::IViewModel>), { L"ViewModel" })
+
+				CLASS_MEMBER_PROPERTY_READONLY_FAST(ViewModel)
 			END_CLASS_MEMBER(demo::MainWindow)
 
 			#undef _
@@ -49,6 +57,7 @@ namespace vl
 			public:
 				void Load(ITypeManager* manager)
 				{
+					ADD_TYPE_INFO(demo::IViewModel)
 					ADD_TYPE_INFO(demo::MainWindow)
 				}
 
diff --git a/Tutorial/GacUI_Layout/RichTextEmbedding/UI/Source/DemoPartialClasses.h b/Tutorial/GacUI_Layout/RichTextEmbedding/UI/Source/DemoPartialClasses.h
index 8088a85f..3624621e 100644
--- a/Tutorial/GacUI_Layout/RichTextEmbedding/UI/Source/DemoPartialClasses.h
+++ b/Tutorial/GacUI_Layout/RichTextEmbedding/UI/Source/DemoPartialClasses.h
@@ -15,29 +15,47 @@ DO NOT MODIFY
 
 namespace demo
 {
+	class IViewModel;
 	class MainWindow;
 
+	class IViewModel : public virtual vl::reflection::IDescriptable, public vl::reflection::Description<IViewModel>
+	{
+	public:
+		virtual void OpenUrl(vl::WString url) = 0;
+	};
+
 	template<typename TImpl>
 	class MainWindow_ : public vl::presentation::controls::GuiWindow, public vl::presentation::GuiInstancePartialClass<vl::presentation::controls::GuiWindow>, public vl::reflection::Description<TImpl>
 	{
 		friend struct vl::reflection::description::CustomTypeDescriptorSelector<TImpl>;
 	private:
+		Ptr<demo::IViewModel> ViewModel_;
 	protected:
+		vl::presentation::controls::GuiDocumentViewer* documentViewer;
 
-		void InitializeComponents()
+		void InitializeComponents(Ptr<demo::IViewModel> ViewModel)
 		{
+			ViewModel_ = ViewModel;
 			if (InitializeFromResource())
 			{
+				GUI_INSTANCE_REFERENCE(documentViewer);
 			}
 			else
 			{
+				ViewModel_ = 0;
 			}
 		}
 	public:
 		MainWindow_()
 			:vl::presentation::GuiInstancePartialClass<vl::presentation::controls::GuiWindow>(L"demo::MainWindow")
 			,vl::presentation::controls::GuiWindow(vl::presentation::theme::GetCurrentTheme()->CreateWindowStyle())
+			,documentViewer(0)
+		{
+		}
+
+		Ptr<demo::IViewModel> GetViewModel()
 		{
+			return ViewModel_;
 		}
 	};
 
@@ -48,6 +66,7 @@ namespace vl
 	{
 		namespace description
 		{
+			DECL_TYPE_INFO(demo::IViewModel)
 			DECL_TYPE_INFO(demo::MainWindow)
 
 		}
@@ -64,7 +83,7 @@ namespace demo
 		// #region CLASS_MEMBER_GUIEVENT_HANDLER (DO NOT PUT OTHER CONTENT IN THIS #region.)
 		// #endregion CLASS_MEMBER_GUIEVENT_HANDLER
 	public:
-		MainWindow();
+		MainWindow(Ptr<demo::IViewModel> ViewModel);
 		~MainWindow();
 	};
 }
diff --git a/Tutorial/GacUI_Layout/UIRes/RichTextEmbedding.bin b/Tutorial/GacUI_Layout/UIRes/RichTextEmbedding.bin
index 5a092047..a911153e 100644
Binary files a/Tutorial/GacUI_Layout/UIRes/RichTextEmbedding.bin and b/Tutorial/GacUI_Layout/UIRes/RichTextEmbedding.bin differ