#ifndef _MObjectSetMessage
#define _MObjectSetMessage
//-
// ==========================================================================
// Copyright (C) 1995 - 2006 Autodesk, Inc., and/or its licensors.  All
// rights reserved.
//
// The coded instructions, statements, computer programs, and/or related
// material (collectively the "Data") in these files contain unpublished
// information proprietary to Autodesk, Inc. ("Autodesk") and/or its
// licensors,  which is protected by U.S. and Canadian federal copyright law
// and by international treaties.
//
// The Data may not be disclosed or distributed to third parties or be
// copied or duplicated, in whole or in part, without the prior written
// consent of Autodesk.
//
// The copyright notices in the Software and this entire statement,
// including the above license grant, this restriction and the following
// disclaimer, must be included in all copies of the Software, in whole
// or in part, and all derivative works of the Software, unless such copies
// or derivative works are solely in the form of machine-executable object
// code generated by a source language processor.

// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND.
// AUTODESK DOES NOT MAKE AND HEREBY DISCLAIMS ANY EXPRESS OR IMPLIED
// WARRANTIES INCLUDING, BUT NOT LIMITED TO, THE WARRANTIES OF
// NON-INFRINGEMENT, MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE,
// OR ARISING FROM A COURSE OF DEALING, USAGE, OR TRADE PRACTICE. IN NO
// EVENT WILL AUTODESK AND/OR ITS LICENSORS BE LIABLE FOR ANY LOST
// REVENUES, DATA, OR PROFITS, OR SPECIAL, DIRECT, INDIRECT, OR
// CONSEQUENTIAL DAMAGES, EVEN IF AUTODESK AND/OR ITS LICENSORS HAS
// BEEN ADVISED OF THE POSSIBILITY OR PROBABILITY OF SUCH DAMAGES.
// ==========================================================================
//+
// ****************************************************************************
//
// CLASS:    MObjectSetMessage
//
// ****************************************************************************

#if defined __cplusplus

// ****************************************************************************
// INCLUDED HEADER FILES


#include <maya/MMessage.h>

// ****************************************************************************
// DECLARATIONS

class MObject;

// ****************************************************************************
// CLASS DECLARATION (MObjectSetMessage)

//! \ingroup OpenMaya
//! \brief Object Set Messages. 
/*!
	This class is used to register callbacks for object set messages received
	by specific sets.

	There is 1 add callback method which will add callbacks for the
	following message

		\li <b>Set Members Modified</b>


	The first parameter passed to each of the add callback methods is the
	object set depenency node that will trigger the callback. The second
	parameter specifies the callback function and the optional third parameter
	specifies the callback argument.

	Each method returns an id which is used to remove the callback.

    To remove a callback use MMessage::removeCallback(). All callbacks that
	are registered by a plug-in must be removed by that plug-in when it is
	unloaded. Failure to do so will result in a fatal error.
*/
class OPENMAYA_EXPORT MObjectSetMessage : public MMessage
{
public:
	static MCallbackId	addSetMembersModifiedCallback(
								MObject& node,
								MMessage::MNodeFunction func,
								void * clientData = NULL,
								MStatus * ReturnStatus = NULL );

	static const char* className();
};

#endif /* __cplusplus */
#endif /* _MObjectSetMessage */