diff --git a/src/UpdateDialogGtk.cpp b/src/UpdateDialogGtk.cpp
index b1afaee..d1daed8 100644
--- a/src/UpdateDialogGtk.cpp
+++ b/src/UpdateDialogGtk.cpp
@@ -73,21 +73,22 @@ void UpdateDialogGtk::finish(GtkWidget* widget, gpointer _dialog)
 
 gboolean UpdateDialogGtk::notify(void* _message)
 {
-	Message* message = static_cast<Message*>(_message);
+	UpdateMessage* message = static_cast<UpdateMessage*>(_message);
+	UpdateDialogGtk* dialog = static_cast<UpdateDialogGtk*>(message->receiver);
 	switch (message->type)
 	{
-		case Message::UpdateProgress:
-			gtk_progress_bar_set_fraction(GTK_PROGRESS_BAR(message->dialog->m_progressBar),message->progress/100.0);
+		case UpdateMessage::UpdateProgress:
+			gtk_progress_bar_set_fraction(GTK_PROGRESS_BAR(dialog->m_progressBar),message->progress/100.0);
 			break;
-		case Message::UpdateFailed:
-			gtk_label_set_text(GTK_LABEL(message->dialog->m_progressLabel),
+		case UpdateMessage::UpdateFailed:
+			gtk_label_set_text(GTK_LABEL(dialog->m_progressLabel),
 			  ("There was a problem installing the update: " + message->message).c_str());;
-			gtk_widget_set_sensitive(message->dialog->m_finishButton,true);
+			gtk_widget_set_sensitive(dialog->m_finishButton,true);
 			break;
-		case Message::UpdateFinished:
-			gtk_label_set_text(GTK_LABEL(message->dialog->m_progressLabel),
+		case UpdateMessage::UpdateFinished:
+			gtk_label_set_text(GTK_LABEL(dialog->m_progressLabel),
 			  "Update installed.  Click 'Finish' to restart the application.");
-			gtk_widget_set_sensitive(message->dialog->m_finishButton,true);
+			gtk_widget_set_sensitive(dialog->m_finishButton,true);
 			break;
 	}
 	delete message;
@@ -99,7 +100,7 @@ gboolean UpdateDialogGtk::notify(void* _message)
 // callbacks during update installation
 void UpdateDialogGtk::updateError(const std::string& errorMessage)
 {
-	Message* message = new Message(this,Message::UpdateFailed);
+	UpdateMessage* message = new UpdateMessage(this,UpdateMessage::UpdateFailed);
 	message->message = errorMessage;
 	g_idle_add(&UpdateDialogGtk::notify,message);
 }
@@ -111,14 +112,14 @@ bool UpdateDialogGtk::updateRetryCancel(const std::string& message)
 
 void UpdateDialogGtk::updateProgress(int percentage)
 {
-	Message* message = new Message(this,Message::UpdateProgress);
+	UpdateMessage* message = new UpdateMessage(this,UpdateMessage::UpdateProgress);
 	message->progress = percentage;
 	g_idle_add(&UpdateDialogGtk::notify,message);
 }
 
 void UpdateDialogGtk::updateFinished()
 {
-	Message* message = new Message(this,Message::UpdateFinished);
+	UpdateMessage* message = new UpdateMessage(this,UpdateMessage::UpdateFinished);
 	g_idle_add(&UpdateDialogGtk::notify,message);
 }
 
diff --git a/src/UpdateDialogGtk.h b/src/UpdateDialogGtk.h
index 8f5e4f7..4af2d2e 100644
--- a/src/UpdateDialogGtk.h
+++ b/src/UpdateDialogGtk.h
@@ -1,5 +1,6 @@
 #pragma once
 
+#include "UpdateMessage.h"
 #include "UpdateObserver.h"
 
 #include <gtk/gtk.h>
@@ -22,27 +23,6 @@ class UpdateDialogGtk : public UpdateObserver
 		virtual void updateFinished();
 
 	private:
-		struct Message
-		{
-			enum Type
-			{
-				UpdateFailed,
-				UpdateProgress,
-				UpdateFinished
-			};
-
-			Message(UpdateDialogGtk* _dialog, Type _type)
-			: dialog(_dialog)
-			, type(_type)
-			{
-			}
-
-			UpdateDialogGtk* dialog;
-			Type type;
-			std::string message;
-			int progress;
-		};
-
 		static void finish(GtkWidget* widget, gpointer dialog);
 		static gboolean notify(void* message);
 
diff --git a/src/UpdateDialogWin32.cpp b/src/UpdateDialogWin32.cpp
index 6e21190..2096089 100644
--- a/src/UpdateDialogWin32.cpp
+++ b/src/UpdateDialogWin32.cpp
@@ -124,7 +124,7 @@ void UpdateDialogWin32::exec()
 
 void UpdateDialogWin32::updateError(const std::string& errorMessage)
 {
-	Message* message = new Message(Message::UpdateFailed);
+	UpdateMessage* message = new UpdateMessage(UpdateMessage::UpdateFailed);
 	message->message = errorMessage;
 	SendNotifyMessage(m_window.GetHwnd(),WM_USER,reinterpret_cast<WPARAM>(message),0);
 }
@@ -136,14 +136,14 @@ bool UpdateDialogWin32::updateRetryCancel(const std::string& message)
 
 void UpdateDialogWin32::updateProgress(int percentage)
 {
-	Message* message = new Message(Message::UpdateProgress);
+	UpdateMessage* message = new UpdateMessage(UpdateMessage::UpdateProgress);
 	message->progress = percentage;
 	SendNotifyMessage(m_window.GetHwnd(),WM_USER,reinterpret_cast<WPARAM>(message),0);
 }
 
 void UpdateDialogWin32::updateFinished()
 {
-	Message* message = new Message(Message::UpdateFinished);
+	UpdateMessage* message = new UpdateMessage(UpdateMessage::UpdateFinished);
 	SendNotifyMessage(m_window.GetHwnd(),WM_USER,reinterpret_cast<WPARAM>(message),0);
 }
 
@@ -169,10 +169,10 @@ LRESULT WINAPI UpdateDialogWin32::windowProc(HWND window, UINT message, WPARAM w
 		{
 			if (window == m_window.GetHwnd())
 			{
-				Message* message = reinterpret_cast<Message*>(wParam);
+				UpdateMessage* message = reinterpret_cast<UpdateMessage*>(wParam);
 				switch (message->type)
 				{
-				case Message::UpdateFailed:
+				case UpdateMessage::UpdateFailed:
 					{
 						m_hadError = true;
 						std::string text = "There was a problem installing the update:\n\n" +
@@ -180,10 +180,10 @@ LRESULT WINAPI UpdateDialogWin32::windowProc(HWND window, UINT message, WPARAM w
 						MessageBox(m_window.GetHwnd(),text.c_str(),"Update Problem",MB_OK);
 					}
 					break;
-				case Message::UpdateProgress:
+				case UpdateMessage::UpdateProgress:
 					m_progressBar.SetPos(message->progress);
 					break;
-				case Message::UpdateFinished:
+				case UpdateMessage::UpdateFinished:
 					{
 						std::string message;
 						m_finishButton.EnableWindow(true);
diff --git a/src/UpdateDialogWin32.h b/src/UpdateDialogWin32.h
index a5103b2..572c3ae 100644
--- a/src/UpdateDialogWin32.h
+++ b/src/UpdateDialogWin32.h
@@ -1,6 +1,7 @@
 #pragma once
 
 #include "Platform.h"
+#include "UpdateMessage.h"
 #include "UpdateObserver.h"
 
 #include "wincore.h"
@@ -25,26 +26,6 @@ class UpdateDialogWin32 : public UpdateObserver
 		LRESULT WINAPI windowProc(HWND window, UINT message, WPARAM wParam, LPARAM lParam);
 
 	private:
-		struct Message
-		{
-			enum Type
-			{
-				UpdateFailed,
-				UpdateProgress,
-				UpdateFinished
-			};
-
-			Message(Type _type)
-			: type(_type)
-			, progress(0)
-			{
-			}
-
-			Type type;
-			std::string message;
-			int progress;
-		};
-
 		void installWindowProc(CWnd* window);
 
 		CWinApp m_app;
diff --git a/src/UpdateMessage.h b/src/UpdateMessage.h
new file mode 100644
index 0000000..6fc6988
--- /dev/null
+++ b/src/UpdateMessage.h
@@ -0,0 +1,37 @@
+#pragma once
+
+#include <string>
+
+class UpdateMessage
+{
+	public:
+		enum Type
+		{
+			UpdateFailed,
+			UpdateProgress,
+			UpdateFinished
+		};
+
+		UpdateMessage(void* receiver, Type type)
+		{
+			init(receiver,type);
+		}
+
+		UpdateMessage(Type type)
+		{
+			init(0,type);
+		}
+
+		void init(void* receiver, Type type)
+		{
+			this->progress = 0;
+			this->receiver = receiver;
+			this->type = type;
+		}
+
+		void* receiver;
+		Type type;
+		std::string message;
+		int progress;
+};
+