diff -r 000000000000 -r a2952bb97e68 mmappfw_plat/mpx_backstepping_utility_api/inc/mpxbacksteppingutility.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/mmappfw_plat/mpx_backstepping_utility_api/inc/mpxbacksteppingutility.h	Thu Dec 17 08:55:47 2009 +0200
@@ -0,0 +1,97 @@
+/*
+* 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 back stepping utility interface definition
+*
+*/
+
+ 
+#ifndef MMPXBACKSTEPPINGUTILITY_H
+#define MMPXBACKSTEPPINGUTILITY_H
+
+
+// INCLUDES
+#include <e32base.h>
+
+const TInt KMPXBackSteppingNotConsumed = 0;
+const TInt KMPXBackSteppingConsumed = 1;
+
+
+// CLASS DECLARATION
+
+/**
+ *  Music Player common utility interface
+ *
+ *  @lib mpxbacksteppingutility.lib
+ */
+NONSHARABLE_CLASS( MMPXBackSteppingUtility )
+    {
+public: 
+
+    /**
+     * Retrieve a back stepping utility of this thread.  All clients in this thread
+     * shares the same utility (singleton)
+     * Call Close() when this object is not needed anymore.
+     *
+     * @since S60 3.2
+     * @return Pointer to backstepping utility. Ownership not transferred.
+     */
+    IMPORT_C static MMPXBackSteppingUtility* UtilityL();
+
+    /**
+     * This method must be called when this object can be freed. This object 
+     * will be destroyed when no one is using it.
+     *
+     * @since S60 3.2
+     */
+    virtual void Close() = 0;
+
+    /**
+     * Forwards activation event.
+     *
+     * @since S60 3.2
+     * @param aState state of application like view ids
+     * @param aEnter indicate if it is entry/exit activation
+     * @return result code retutned by BS Service interface
+     * @leave leaves from HandleResultL are propagated
+     */
+    virtual TInt ForwardActivationEventL(
+        const TDesC8& aState,
+        const TBool aEnter ) = 0;
+    
+    /**
+     * Handles back command.
+     *
+     * @since S60 3.2
+     * @param aState state of application like view ids
+     * @return result code retutned by BS Service interface
+     * @leave leaves from HandleResultL are propagated
+     */
+    virtual TInt HandleBackCommandL( const TDesC8& aState ) = 0;
+
+    /**
+     * Initializes Backstepping Service.
+     *
+     * @since S60 3.2
+     * @param aUid client application UID
+     * @leave KErrNotSupported or KErrArgument 
+     *        (if arguments passed to BS Service are incorrect 
+     *        or could not initialize BS)
+     *        KErrNotFound (if there was no return value)
+     */
+    virtual void InitializeL( const TUid aUid ) = 0;
+    };
+
+#endif  // MMPXBACKSTEPPINGUTILITY_H
+
+// End of File