diff -r 000000000000 -r 094583676ce7 wvuing/wvuiprocess/Inc/MCAConversationObserverPC.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/wvuing/wvuiprocess/Inc/MCAConversationObserverPC.h	Thu Dec 17 08:41:52 2009 +0200
@@ -0,0 +1,72 @@
+/*
+* Copyright (c) 2006 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:  Observer interface to handle chat container changes.
+*
+*/
+
+
+#ifndef __MCACONVERSATIONOBSERVERPC_H__
+#define __MCACONVERSATIONOBSERVERPC_H__
+
+//  INCLUDES
+#include <e32def.h>
+#include "TEnumsPC.h"
+
+// CLASS DECLARATION
+
+/**
+ *  Observer interface to handle messages container changes.
+ *
+ *  @lib wvuiprocessng.dll
+ *  @since 3.2
+ */
+class MCAConversationObserverPC
+    {
+    public: // Interface
+        /**
+         * Handle chat events. - MCAConversationObserverPC
+         * @param aWvid - WVID
+         * @param aContactId - Contact identification
+         */
+        virtual void HandleChatEvent( 	const TDesC& aWvid,
+                                       const TDesC& aContactId ) = 0;
+
+        /**
+         * Handle events - MCAConversationObserverPC
+         * @param aError
+         * @param aInfo, Event occurred because of message
+         * @param aMsgContentType - Content of the message
+         */
+        virtual void HandleMessageError( TInt aError,
+                                         const TDesC& aInfo,
+                                         TEnumsPC::TContentType aMsgContentType ) = 0;
+
+        /**
+         * Handle events - MCAConversationObserverPC
+         * @param aContactId The contact which was affected (add/delete/change)
+         * this function is called when there is any change w.r.t contacts
+         *
+         */
+        virtual void HandleContactChange( const TDesC& aContactId ) = 0;
+
+
+        /**
+         * Destructor
+         */
+        virtual ~MCAConversationObserverPC() {}
+    };
+
+#endif      // __MCACONVERSATIONOBSERVERPC_H__
+
+// End of File