diff -r 000000000000 -r dfb7c4ff071f commsfwsupport/commselements/serverden/inc/sd_apiextensionipc.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/commsfwsupport/commselements/serverden/inc/sd_apiextensionipc.h	Thu Dec 17 09:22:25 2009 +0200
@@ -0,0 +1,51 @@
+// Copyright (c) 2008-2009 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:
+//
+
+/**
+ @file
+ @internalTechnology
+*/
+
+#ifndef SYMBIAN_DEN_APIEXTENSIONIPC_H
+#define SYMBIAN_DEN_APIEXTENSIONIPC_H
+
+
+namespace Den
+/**
+@internalTechnology
+*/
+{
+
+//Must be common to all technologies using this ApiExt mechanism
+//therefore a very big number to minimise the risk of a clash.
+enum TMessIPC
+	{
+//TODO - perhaps we could reuse RMessage2 flags to differenciate session/subsession?
+	EIpcSubSessionApiExtIfaceOpen = 2000000000,
+	EIpcSubSessionApiExtIfaceSend,
+	EIpcSubSessionApiExtIfaceSendReceive,
+	EIpcSubSessionApiExtIfaceClose,
+
+	EIpcSessionApiExtIfaceOpen,
+	EIpcSessionApiExtIfaceSend,
+	EIpcSessionApiExtIfaceSendReceive,
+	EIpcSessionApiExtIfaceClose
+	};
+
+} //namespace Den
+
+#endif
+//SYMBIAN_DEN_APIEXTENSIONIPC_H
+