diff -r 3104fc151679 -r 9a48e301e94b imstutils/imconversationview/imcvuiengine/inc/mimcvenginemessageobserver.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/imstutils/imconversationview/imcvuiengine/inc/mimcvenginemessageobserver.h	Wed Sep 01 12:33:36 2010 +0100
@@ -0,0 +1,72 @@
+/*
+* Copyright (c) 2007-2008 Nokia Corporation and/or its subsidiary(-ies).
+* All rights reserved.
+* This component and the accompanying materials are made available
+* under the terms of "Eclipse Public License v1.0"
+* which accompanies this distribution, and is available
+* at the URL "http://www.eclipse.org/legal/epl-v10.html".
+*
+* Initial Contributors:
+* Nokia Corporation - initial contribution.
+*
+* Contributors:
+*
+* Description:  messge observer interface 
+*
+*/
+
+
+#ifndef __MIMCVENGINEMESSAGEOBSERVER_H__
+#define __MIMCVENGINEMESSAGEOBSERVER_H__
+
+//  INCLUDES
+#include <e32def.h>
+
+//	FORWARD CLASS DECLERATIONS
+
+// CLASS DECLARATION
+
+/**
+ *  Observer interface to handle message container changes.
+ *
+ *  @lib imcvengine.dll
+ *  @since 5.0
+ */
+class MIMCVEngineMessageObserver
+	{
+
+	public: // Definitions
+
+		/**
+		 * Events for observer to handle.
+		 */
+		enum TMessageEventType
+			{
+			ENewMessage,
+			EMessageChanged,
+			EMessageDeleted,
+			EChatDeleted
+			};
+
+	public: // Interface
+
+		/**
+		 * Handle events.
+		 * @param aEvent Event to handle.
+		 * @param aIndex, Index of message which is affected by event.
+		 */
+		virtual void HandleMessageEvent( TMessageEventType aEvent, TInt aIndex = -1 ) = 0;
+		
+		
+	
+	protected: // For protection.
+
+		/**
+		 * Destructor for protection
+		 */
+		virtual ~MIMCVEngineMessageObserver(){}
+	};
+
+#endif      // __MIMCVENGINEMESSAGEOBSERVER_H__
+
+// End of File