diff --git a/Assets/uDesktopDuplication/Plugins/uDesktopDuplication.dll b/Assets/uDesktopDuplication/Plugins/uDesktopDuplication.dll
index 5964779..2da96d2 100644
Binary files a/Assets/uDesktopDuplication/Plugins/uDesktopDuplication.dll and b/Assets/uDesktopDuplication/Plugins/uDesktopDuplication.dll differ
diff --git a/Assets/uDesktopDuplication/Scripts/Lib.cs b/Assets/uDesktopDuplication/Scripts/Lib.cs
index 2445604..21ef19d 100644
--- a/Assets/uDesktopDuplication/Scripts/Lib.cs
+++ b/Assets/uDesktopDuplication/Scripts/Lib.cs
@@ -5,6 +5,12 @@ using System.Runtime.InteropServices;
 namespace uDesktopDuplication
 {
 
+public enum Message
+{
+    None = -1,
+    Reinitialized = 0,
+}
+
 public enum CursorShapeType
 {
     MonoChrome = 1,
@@ -14,6 +20,16 @@ public enum CursorShapeType
 
 public static class Lib
 {
+    public delegate void MessageHandler(Message message);
+
+    [DllImport("uDesktopDuplication")]
+    public static extern void Initialize();
+    [DllImport("uDesktopDuplication")]
+    public static extern void Finalize();
+    [DllImport("uDesktopDuplication")]
+    public static extern void Update();
+    [DllImport("uDesktopDuplication")]
+    public static extern Message PopMessage();
     [DllImport("uDesktopDuplication")]
     public static extern int GetMonitorCount();
     [DllImport("uDesktopDuplication")]
diff --git a/Assets/uDesktopDuplication/Scripts/Manager.cs b/Assets/uDesktopDuplication/Scripts/Manager.cs
index 0220dde..968ce67 100644
--- a/Assets/uDesktopDuplication/Scripts/Manager.cs
+++ b/Assets/uDesktopDuplication/Scripts/Manager.cs
@@ -26,7 +26,7 @@ public class Manager : MonoBehaviour
 
     static public int monitorCount
     {
-        get { return instance.monitors_.Count; }
+        get { return Lib.GetMonitorCount(); }
     }
 
     static public Monitor primary
@@ -41,19 +41,25 @@ public class Manager : MonoBehaviour
     int timeout = 0;
 
     private Coroutine renderCoroutine_ = null;
+    Message message_ = Message.None;
 
     void Awake()
     {
+        Lib.Initialize();
+
         if (instance_ != null) return;
         instance_ = this;
 
-        for (int i = 0; i < Lib.GetMonitorCount(); ++i) {
-            monitors.Add(new Monitor(i));
-        }
+        CreateMonitors();
 
         Lib.SetTimeout(timeout);
     }
 
+    void OnApplicationQuit()
+    {
+        Lib.Finalize();
+    }
+
     void OnEnable()
     {
         renderCoroutine_ = StartCoroutine(OnRender());
@@ -67,6 +73,26 @@ public class Manager : MonoBehaviour
         }
     }
 
+    void Update()
+    {
+        Lib.Update();
+
+        var message = Lib.PopMessage();
+        while (message != Message.None) {
+            switch (message) {
+                case Message.Reinitialized:
+                    Debug.Log("Reinitialize");
+                    Reinitialize();
+                    break;
+                default:
+                    break;
+            }
+            message = Lib.PopMessage();
+        }
+
+        message_ = Message.None;
+    }
+
     IEnumerator OnRender()
     {
         for (;;) {
@@ -80,6 +106,28 @@ public class Manager : MonoBehaviour
             }
         }
     }
+
+    void CreateMonitors()
+    {
+        for (int i = 0; i < monitorCount; ++i) {
+            monitors.Add(new Monitor(i));
+        }
+    }
+
+    void OnMessage(Message message)
+    {
+        message_ = message;
+    }
+
+    void Reinitialize()
+    {
+        for (int i = 0; i < monitorCount; ++i) {
+            if (i == monitors.Count) {
+                monitors.Add(new Monitor(i));
+            }
+            monitors[i].Reinitialize();
+        }
+    }
 }
 
 }
\ No newline at end of file
diff --git a/Assets/uDesktopDuplication/Scripts/Monitor.cs b/Assets/uDesktopDuplication/Scripts/Monitor.cs
index f886f6b..9ee82d4 100644
--- a/Assets/uDesktopDuplication/Scripts/Monitor.cs
+++ b/Assets/uDesktopDuplication/Scripts/Monitor.cs
@@ -16,6 +16,11 @@ public class Monitor
         private set; 
     }
 
+    public bool exists
+    { 
+        get { return id < Manager.monitorCount; } 
+    }
+
     public string name
     { 
         get { return Lib.GetName(id); }
@@ -93,10 +98,7 @@ public class Monitor
         get 
         { 
             if (texture_ == null) {
-                var w = isHorizontal ? width : height;
-                var h = isHorizontal ? height : width;
-                texture_ = new Texture2D(w, h, TextureFormat.BGRA32, false);
-                Lib.SetTexturePtr(id, texture_.GetNativeTexturePtr());
+                CreateTexture();
             }
             return texture_;
         }
@@ -104,6 +106,7 @@ public class Monitor
 
     public void Render()
     {
+        Lib.SetTexturePtr(id, texture_.GetNativeTexturePtr());
         GL.IssuePluginEvent(Lib.GetRenderEventFunc(), id);
     }
 
@@ -111,6 +114,31 @@ public class Monitor
     {
         Lib.UpdateCursorTexture(id, ptr);
     }
+
+    void CreateTexture()
+    {
+        var w = isHorizontal ? width : height;
+        var h = isHorizontal ? height : width;
+        bool shouldCreate = true;
+
+        if (texture_) {
+            if (texture_.width != w || texture_.height != h) {
+                if (texture_) Object.DestroyImmediate(texture_);
+                shouldCreate = true;
+            } else { 
+                shouldCreate = false;
+            }
+        }
+
+        if (shouldCreate) {
+            texture_ = new Texture2D(w, h, TextureFormat.BGRA32, false);
+        }
+    }
+
+    public void Reinitialize()
+    {
+        CreateTexture();
+    }
 }
 
 }
\ No newline at end of file
diff --git a/Plugins/uDesktopDuplication/uDesktopDuplication/Common.h b/Plugins/uDesktopDuplication/uDesktopDuplication/Common.h
index ade96bf..5367cbe 100644
--- a/Plugins/uDesktopDuplication/uDesktopDuplication/Common.h
+++ b/Plugins/uDesktopDuplication/uDesktopDuplication/Common.h
@@ -5,4 +5,11 @@ class MonitorManager;
 
 IUnityInterfaces* GetUnity();
 ID3D11Device* GetDevice();
-const std::unique_ptr<MonitorManager>& GetMonitorManager();
\ No newline at end of file
+const std::unique_ptr<MonitorManager>& GetMonitorManager();
+
+enum class Message
+{
+	None = -1,
+	Reinitialized = 0,
+};
+void SendMessageToUnity(Message message);
\ No newline at end of file
diff --git a/Plugins/uDesktopDuplication/uDesktopDuplication/Monitor.cpp b/Plugins/uDesktopDuplication/uDesktopDuplication/Monitor.cpp
index 5883d6b..bff7928 100644
--- a/Plugins/uDesktopDuplication/uDesktopDuplication/Monitor.cpp
+++ b/Plugins/uDesktopDuplication/uDesktopDuplication/Monitor.cpp
@@ -8,27 +8,64 @@
 Monitor::Monitor(int id, IDXGIOutput* output)
     : id_(id)
 {
-    // MEMO: 'output' will be released automatically after this ctor.
     output->GetDesc(&outputDesc_);
     monitorInfo_.cbSize = sizeof(MONITORINFOEX);
     GetMonitorInfo(outputDesc_.Monitor, &monitorInfo_);
 
     auto output1 = reinterpret_cast<IDXGIOutput1*>(output);
-    output1->DuplicateOutput(GetDevice(), &deskDupl_);
+    const auto hr = output1->DuplicateOutput(GetDevice(), &deskDupl_);
+
+	auto error = 0;
+
+	// TODO: error check
+    switch (hr)
+    {
+        case S_OK:
+            break;
+        case E_INVALIDARG:
+			error = 1;
+            break;
+        case E_ACCESSDENIED:
+			error = 2;
+			// For example, when the user presses Ctrl + Alt + Delete and the screen
+			// switches to admin screen, this error occurs. 
+            break;
+        case DXGI_ERROR_UNSUPPORTED:
+			error = 3;
+            break;
+		case DXGI_ERROR_NOT_CURRENTLY_AVAILABLE:
+			error = 4;
+			// Other application use Desktop Duplication API...
+            break;
+        case DXGI_ERROR_SESSION_DISCONNECTED:
+			error = 5;
+			break;
+    }
 
     cursor_ = std::make_unique<Cursor>(this);
+
+    // MEMO: 'output' will be released automatically after this ctor.
 }
 
 
 Monitor::~Monitor()
 {
-    deskDupl_->Release();
+	if (deskDupl_ != nullptr)
+	{
+		deskDupl_->Release();
+	}
 }
 
 
 HRESULT Monitor::Render(UINT timeout)
 {
-    if (deskDupl_ == nullptr || unityTexture_ == nullptr) return 0;
+	if (deskDupl_ == nullptr)
+	{
+		GetMonitorManager()->RequireReinitilization();
+		return 0;
+	}
+
+	if (unityTexture_ == nullptr) return 0;
 
     IDXGIResource* resource = nullptr;
     DXGI_OUTDUPL_FRAME_INFO frameInfo;
diff --git a/Plugins/uDesktopDuplication/uDesktopDuplication/MonitorManager.cpp b/Plugins/uDesktopDuplication/uDesktopDuplication/MonitorManager.cpp
index 8f9b2dc..d4a4f5a 100644
--- a/Plugins/uDesktopDuplication/uDesktopDuplication/MonitorManager.cpp
+++ b/Plugins/uDesktopDuplication/uDesktopDuplication/MonitorManager.cpp
@@ -6,6 +6,7 @@
 #include "IUnityInterface.h"
 #include "IUnityGraphicsD3D11.h"
 
+#include "Common.h"
 #include "Monitor.h"
 #include "Cursor.h"
 #include "MonitorManager.h"
@@ -56,6 +57,13 @@ void MonitorManager::Finalize()
 }
 
 
+void MonitorManager::Reinitialize()
+{
+	Initialize();
+	SendMessageToUnity(Message::Reinitialized);
+}
+
+
 std::shared_ptr<Monitor> MonitorManager::GetMonitor(int id) const
 {
     if (id >= 0 && id < monitors_.size())
@@ -66,6 +74,16 @@ std::shared_ptr<Monitor> MonitorManager::GetMonitor(int id) const
 }
 
 
+void MonitorManager::Update()
+{
+	if (isReinitializationRequired_)
+	{
+		Reinitialize();
+		isReinitializationRequired_ = false;
+	}
+}
+
+
 void MonitorManager::OnRender(int id)
 {
     if (auto monitor = GetMonitor(id))
@@ -75,7 +93,7 @@ void MonitorManager::OnRender(int id)
         const auto hr = monitor->Render(timeout_);
         if (hr == DXGI_ERROR_ACCESS_LOST)
         {
-            Initialize();
+			isReinitializationRequired_ = true;
         }
     }
 }
diff --git a/Plugins/uDesktopDuplication/uDesktopDuplication/MonitorManager.h b/Plugins/uDesktopDuplication/uDesktopDuplication/MonitorManager.h
index 08b9e9b..efa03ab 100644
--- a/Plugins/uDesktopDuplication/uDesktopDuplication/MonitorManager.h
+++ b/Plugins/uDesktopDuplication/uDesktopDuplication/MonitorManager.h
@@ -14,6 +14,8 @@ public:
     explicit MonitorManager();
     ~MonitorManager();
 
+	void RequireReinitilization() { isReinitializationRequired_ = true; }
+
     void SetCursorMonitorId(int id) { cursorMonitorId_ = id; }
     int GetCursorMonitorId() const { return cursorMonitorId_; }
     std::shared_ptr<Monitor> GetMonitor(int id) const;
@@ -21,10 +23,12 @@ public:
 private:
     void Initialize();
     void Finalize();
+	void Reinitialize();
 
 // Setters from Unity
 public:
     void OnRender(int id);
+	void Update();
     void UpdateCursorTexture(int id, ID3D11Texture2D* ptr);
     void SetTimeout(int timeout);
     void SetTexturePtr(int id, void* texture);
@@ -49,4 +53,5 @@ private:
     std::vector<std::shared_ptr<Monitor>> monitors_;
     std::shared_ptr<Cursor> cursor_;
     int cursorMonitorId_ = -1;
+	bool isReinitializationRequired_ = false;
 };
\ No newline at end of file
diff --git a/Plugins/uDesktopDuplication/uDesktopDuplication/main.cpp b/Plugins/uDesktopDuplication/uDesktopDuplication/main.cpp
index 03f5d78..ee035b1 100644
--- a/Plugins/uDesktopDuplication/uDesktopDuplication/main.cpp
+++ b/Plugins/uDesktopDuplication/uDesktopDuplication/main.cpp
@@ -3,6 +3,7 @@
 #include <vector>
 #include <string>
 #include <memory>
+#include <queue>
 
 #include "IUnityInterface.h"
 #include "IUnityGraphics.h"
@@ -18,6 +19,7 @@ namespace
 {
     IUnityInterfaces* g_unity = nullptr;
     std::unique_ptr<MonitorManager> g_manager;
+	std::queue<Message> g_messages;
 }
 
 
@@ -32,27 +34,49 @@ ID3D11Device* GetDevice()
     return GetUnity()->Get<IUnityGraphicsD3D11>()->GetDevice();
 }
 
+
 const std::unique_ptr<MonitorManager>& GetMonitorManager()
 {
     return g_manager;
 }
 
 
+void SendMessageToUnity(Message message)
+{
+	g_messages.push(message);
+}
+
+
 extern "C"
 {
+    UNITY_INTERFACE_EXPORT void UNITY_INTERFACE_API Initialize()
+    {
+		if (g_unity && !g_manager)
+		{
+			g_manager = std::make_unique<MonitorManager>();
+		}
+    }
+
+    UNITY_INTERFACE_EXPORT void UNITY_INTERFACE_API Finalize()
+    {
+		g_manager.reset();
+    }
+
     UNITY_INTERFACE_EXPORT void UNITY_INTERFACE_API UnityPluginLoad(IUnityInterfaces* unityInterfaces)
     {
         g_unity = unityInterfaces;
-        g_manager = std::make_unique<MonitorManager>();
+		Initialize();
     }
 
     UNITY_INTERFACE_EXPORT void UNITY_INTERFACE_API UnityPluginUnload()
     {
-        g_manager.reset();
+		g_unity = nullptr;
+		Finalize();
     }
 
     void UNITY_INTERFACE_API OnRenderEvent(int id)
     {
+		if (!g_manager) return;
         g_manager->OnRender(id);
     }
 
@@ -61,78 +85,108 @@ extern "C"
         return OnRenderEvent;
     }
 
+    UNITY_INTERFACE_EXPORT void UNITY_INTERFACE_API Update()
+    {
+		if (!g_manager) return;
+		g_manager->Update();
+    }
+
+	UNITY_INTERFACE_EXPORT Message PopMessage()
+	{
+		if (g_messages.empty()) return Message::None;
+
+		const auto message = g_messages.front();
+		g_messages.pop();
+		return message;
+	}
+
     UNITY_INTERFACE_EXPORT size_t UNITY_INTERFACE_API GetMonitorCount()
     {
+		if (!g_manager) return 0;
         return g_manager->GetMonitorCount();
     }
 
     UNITY_INTERFACE_EXPORT void UNITY_INTERFACE_API SetTimeout(int timeout)
     {
+		if (!g_manager) return;
         g_manager->SetTimeout(timeout);
     }
 
     UNITY_INTERFACE_EXPORT void UNITY_INTERFACE_API GetName(int id, char* buf, int len)
     {
+		if (!g_manager) return;
         g_manager->GetName(id, buf, len);
     }
 
     UNITY_INTERFACE_EXPORT bool UNITY_INTERFACE_API IsPrimary(int id)
     {
+		if (!g_manager) return false;
         return g_manager->IsPrimary(id);
     }
 
     UNITY_INTERFACE_EXPORT int UNITY_INTERFACE_API GetWidth(int id)
     {
+		if (!g_manager) return -1;
         return g_manager->GetWidth(id);
     }
 
     UNITY_INTERFACE_EXPORT int UNITY_INTERFACE_API GetHeight(int id)
     {
+		if (!g_manager) return -1;
         return g_manager->GetHeight(id);
     }
 
-    UNITY_INTERFACE_EXPORT int UNITY_INTERFACE_API IsCursorVisible(int id)
+    UNITY_INTERFACE_EXPORT bool UNITY_INTERFACE_API IsCursorVisible(int id)
     {
+		if (!g_manager) return false;
         return g_manager->IsCursorVisible(id);
     }
 
     UNITY_INTERFACE_EXPORT int UNITY_INTERFACE_API GetCursorX(int id)
     {
+		if (!g_manager) return -1;
         return g_manager->GetCursorX(id);
     }
 
     UNITY_INTERFACE_EXPORT int UNITY_INTERFACE_API GetCursorY(int id)
     {
+		if (!g_manager) return -1;
         return g_manager->GetCursorY(id);
     }
 
     UNITY_INTERFACE_EXPORT int UNITY_INTERFACE_API GetCursorShapeWidth(int id)
     {
+		if (!g_manager) return -1;
         return g_manager->GetCursorShapeWidth(id);
     }
 
     UNITY_INTERFACE_EXPORT int UNITY_INTERFACE_API GetCursorShapeHeight(int id)
     {
+		if (!g_manager) return -1;
         return g_manager->GetCursorShapeHeight(id);
     }
 
     UNITY_INTERFACE_EXPORT int UNITY_INTERFACE_API GetCursorShapePitch(int id)
     {
+		if (!g_manager) return -1;
         return g_manager->GetCursorShapePitch(id);
     }
 
     UNITY_INTERFACE_EXPORT int UNITY_INTERFACE_API GetCursorShapeType(int id)
     {
+		if (!g_manager) return -1;
         return g_manager->GetCursorShapeType(id);
     }
 
     UNITY_INTERFACE_EXPORT void UNITY_INTERFACE_API UpdateCursorTexture(int id, ID3D11Texture2D* ptr)
     {
+		if (!g_manager) return;
         g_manager->UpdateCursorTexture(id, ptr);
     }
 
     UNITY_INTERFACE_EXPORT void UNITY_INTERFACE_API SetTexturePtr(int id, void* texture)
     {
+		if (!g_manager) return;
         g_manager->SetTexturePtr(id, texture);
     }
 }
\ No newline at end of file