diff -r 6ca72c0fe49a -r a941bc465d9f inc/MPEngNWSessionSlotObserver2.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/inc/MPEngNWSessionSlotObserver2.h	Wed Sep 01 12:31:13 2010 +0100
@@ -0,0 +1,105 @@
+/*
+* Copyright (c) 2004 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 receive NWSessionSlot change notifications.
+*
+*/
+
+#ifndef __MPENGNWSESSIONSLOTOBSERVER2_H
+#define __MPENGNWSESSIONSLOTOBSERVER2_H
+
+//  INCLUDES
+#include <E32Std.h>
+
+
+// FORWARD DECLARATIONS
+class CPEngNWSessionSlotNotifier2;
+class CPEngNWSessionSlotEvent2;
+
+
+// CLASS DECLARATION
+
+
+/**
+ * Observer interface to get NWSessionSlot change notifications.
+ * Observer is registered to CPEngNWSessionSlotNotifier2.
+ *
+ * @since 3.0
+ */
+class MPEngNWSessionSlotObserver2
+    {
+    public: //Observing methods
+
+
+        /**
+         * NWSessionSlot change handler.
+         *
+         * Called by CPEngNWSessionSlotNotifier2 to report NWSessionSlot
+         * changed events. If this method leaves, error code is
+         * reported back to HandleNWSessionSlotError().
+         *
+         * @since 3.0
+         * @param aNotifier The notifier source where notification
+         *        is coming from. No ownership transferred.
+         * @param aEvent The event container.  No ownership transferred.
+         */
+        virtual void HandleNWSessionSlotChangeL(
+            CPEngNWSessionSlotNotifier2& aNotifier,
+            CPEngNWSessionSlotEvent2& aEvent ) = 0;
+
+
+        /**
+         * Notification failure handler.
+         *
+         * @since 3.0
+         * @param aError The error resulting from Presence Engine internal
+         *        change event handling (e.g. out of memory) or
+         *        leave error from HandleNWSessionSlotChangeL().
+         * @param aNotifier The notifier of which event handling failed.
+         *        No ownership transferred.
+         */
+        virtual void HandleNWSessionSlotError(
+            TInt aError,
+            CPEngNWSessionSlotNotifier2& aNotifier ) = 0;
+
+
+    private: //Extensions
+
+        /**
+         * Reserved virtual table slots for future use.
+         * Do not implement this.
+         *
+         * @since 3.0
+         */
+        virtual TInt NWSessionSlotObserverReserved() {
+            return KErrNotSupported;
+            }
+
+
+
+    protected:  //Destructor
+        /**
+         * Protected destructor.
+         * Observers can't be destroyed via this interface.
+         */
+        virtual ~MPEngNWSessionSlotObserver2() { }
+
+    };
+
+
+#endif //__MPENGNWSESSIONSLOTOBSERVER2_H
+
+
+//End of file
+
+