diff -r e1b950c65cb4 -r 837f303aceeb epoc32/include/app/MVPbkStreamable.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/epoc32/include/app/MVPbkStreamable.h	Wed Mar 31 12:33:34 2010 +0100
@@ -0,0 +1,70 @@
+/*
+* Copyright (c) 2004-2007 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:  An interface for objects that can be written into stream.
+*
+*/
+
+
+#ifndef MVPBKSTREAMABLE_H
+#define MVPBKSTREAMABLE_H
+
+// INCLUDES
+#include <e32std.h>
+
+// FORWARD DECLARATIONS
+class RReadStream;
+class RWriteStream;
+
+// CLASS DECLARATIONS
+
+/**
+ * An interface for objects that can be written into stream.
+ */
+class MVPbkStreamable
+    {
+    protected: // destructor
+        /**
+         * Destructor.
+         */
+        virtual ~MVPbkStreamable() { }
+
+    public: // interface
+        /**
+         * Outputs this objects state to aStream.
+         *
+         * @param aStream A stream for writing the object state.
+         */
+        virtual void ExternalizeL( RWriteStream& aStream ) const = 0;
+        
+        /**
+         * Returns the externalized size of the object in bytes.
+         *
+         * @return The externalized size of the object.
+         */
+        virtual TInt ExternalizedSize() const = 0;
+
+        /**
+         * Returns an extension point for this interface or NULL.
+         *
+         * @param aExtensionUid no extensions defined currently.
+         * @return An extension point for this interface or NULL.
+         */
+        virtual TAny* StreamableExtension( TUid /*aExtensionUid*/ ) 
+                { return NULL; }
+
+    };
+
+#endif // MVPBKSTREAMABLE_H
+
+//End of file