--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/emailservices/emailframework/commonlib/inc/cmailmessageext.h	Thu Dec 17 08:39:21 2009 +0200
@@ -0,0 +1,58 @@
+/*
+* Copyright (c) 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:  Message extension interface
+*
+*/
+
+#ifndef CMAILMESSAGEEXT_H
+#define CMAILMESSAGEEXT_H
+
+#include "cemailextensionbase.h"
+
+// interface UID value passed to CFSMailMessageBase::ExtensionL
+const TUid KEmailMessageExtensionUid        = { 0x2001E288 };
+
+/**
+ * Message extension interface
+ * 
+ * @code
+ * // below message is of type CFSMailMessageBase (or its derived type)
+ * CEmailExtension* extension = message->ExtensionL( KEmailMessageExtensionUid );
+ * CMailMessageExtension* mExt = reinterpret_cast<CMailMessageExtension*>( extension );
+ * mExt->CommitL();
+ * // Release extension when not needed any more.
+ * message->ReleaseExtension( extension );
+ * @endcode
+ * 
+ */
+class CMailMessageExtension : public CEmailExtension
+{
+public:
+    
+    /**
+     * Commits changes of the message to store.
+     *
+     */
+    virtual void CommitL() = 0;
+
+protected:    
+    inline CMailMessageExtension();
+};
+
+inline CMailMessageExtension::CMailMessageExtension() :
+         CEmailExtension( KEmailMessageExtensionUid )
+    {
+    }
+         
+#endif // CMAILMESSAGEEXT_H