diff -r 000000000000 -r a2952bb97e68 mpx/inc/mpxclientlistobserver.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/mpx/inc/mpxclientlistobserver.h	Thu Dec 17 08:55:47 2009 +0200
@@ -0,0 +1,60 @@
+/*
+* Copyright (c) 2007 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:  MPX client list observer interface definition
+*
+*/
+
+
+
+#ifndef MMPXCLIENTLISTOBSERVER_H
+#define MMPXCLIENTLISTOBSERVER_H
+
+
+// INCLUDES
+#include <e32base.h>
+
+
+// FORWARD DECLARATIONS
+
+
+// CLASS DECLARATION
+
+/**
+ *  MPX client list observer.
+ *
+ *  @lib mpxcommon.lib
+ *  @since S60 v3.1
+ */
+NONSHARABLE_CLASS( MMPXClientlistObserver )
+    {
+public:
+    enum TChangeType
+        {
+        EAdd,
+        ERemove
+        };
+    /**
+     * Handle client change
+     *
+     * @since 3.1
+     * @param aPid Process id of the client
+     * @param aChangeType EAdd - new client added, ERemove - a client is removed.
+     */
+    virtual void HandleClientChange(const TProcessId& aPid, 
+                                    TChangeType aChangeType) = 0;
+    };
+
+#endif  // MMPXCLIENTLISTOBSERVER_H
+
+// End of File