text: //
  //////////////////////////////////////////////////////////////////////////////
  //
  //  Copyright 2013 Autodesk, Inc.  All rights reserved.
  //
  //  Use of this software is subject to the terms of the Autodesk license 
  //  agreement provided at the time of installation or download, or which 
  //  otherwise accompanies this software in either electronic or hard copy form.   
  //
  //////////////////////////////////////////////////////////////////////////////
  
  #ifndef OLEAUTO_H
  #define OLEAUTO_H
  #include "adesk.h"
  #ifdef _ADESK_WINDOWS_
  #include "dbmain.h"
  #include <wtypes.h>
  #pragma pack (push, 8)
  
  //
  // AcAxOleLinkManager is used to maintain the link between an ARX
  // objects and their respective COM wrapper.
  //
  class AcAxOleLinkManager
  {
  public:
      
      // Given a pointer to a database resident object, return
      // the IUnknown of the COM wrapper. NULL is returned if
      // no wrapper is found.
      virtual IUnknown* GetIUnknown(AcDbObject* pObject) = 0;
  
      // Set the link between a database resident object and a 
      // COM wrapper. If the IUnknown is NULL, then the link is removed.
      virtual Adesk::Boolean SetIUnknown(AcDbObject* pObject, IUnknown* pUnknown) = 0;
  
      // Given a pointer to a database object, return
      // the IUnknown of the COM wrapper. NULL is returned if
      // no wrapper is found.
      virtual IUnknown* GetIUnknown(AcDbDatabase* pDatabase) = 0;
  
      // Set the link between a database object and a COM wrapper. 
      // If the IUnknown is NULL, then the link is removed.
      virtual Adesk::Boolean SetIUnknown(AcDbDatabase* pDatabase, IUnknown* pUnknown) = 0;
  
      // Given a pointer to a database object, return the
      // IDispatch of then document object. NULL is returned if
      // the database does not belong to a particular document.
      virtual IDispatch* GetDocIDispatch(AcDbDatabase* pDatabase) = 0;
  
      // Set the link between a database object and the IDispatch
      // of the document it belongs to. If the IDispatch is NULL, then 
      // the link is removed.
      virtual Adesk::Boolean SetDocIDispatch(AcDbDatabase* pDatabase, IDispatch* pDispatch) = 0;
  
      // Given a pointer to a database resident object and a subentID, return
      // the IUnknown of the COM wrapper. NULL is returned if
      // no wrapper is found.
      virtual IUnknown* GetIUnknown(AcDbObject* pObject,
          const AcDbSubentId &id) = 0;
  
      // Set the link between a database resident object, a subentID and a 
      // COM wrapper. If the IUnknown is NULL, then the link is removed.
      virtual Adesk::Boolean SetIUnknown(AcDbObject* pObject,
          const AcDbSubentId &id, IUnknown* pUnknown) = 0;
  };
  
  AcAxOleLinkManager* AcAxGetOleLinkManager();
  
  #pragma pack (pop)
  
  #endif //_ADESK_WINDOWS_
  #endif // OLEAUTO_H
  