text: //
  // (C) Copyright 1993-1999 by Autodesk, Inc.
  //
  // Permission to use, copy, modify, and distribute this software in
  // object code form for any purpose and without fee is hereby granted, 
  // provided that the above copyright notice appears in all copies and 
  // that both that copyright notice and the limited warranty and
  // restricted rights notice below appear in all supporting 
  // documentation.
  //
  // AUTODESK PROVIDES THIS PROGRAM "AS IS" AND WITH ALL FAULTS. 
  // AUTODESK SPECIFICALLY DISCLAIMS ANY IMPLIED WARRANTY OF
  // MERCHANTABILITY OR FITNESS FOR A PARTICULAR USE.  AUTODESK, INC. 
  // DOES NOT WARRANT THAT THE OPERATION OF THE PROGRAM WILL BE
  // UNINTERRUPTED OR ERROR FREE.
  //
  // Use, duplication, or disclosure by the U.S. Government is subject to 
  // restrictions set forth in FAR 52.227-19 (Commercial Computer
  // Software - Restricted Rights) and DFAR 252.227-7013(c)(1)(ii)
  // (Rights in Technical Data and Computer Software), as applicable.
  //
  
  #ifndef OLEAUTO_H
  #define OLEAUTO_H
  
  #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;
  };
  
  AcAxOleLinkManager* AcAxGetOleLinkManager();
  
  #pragma pack (pop)
  #endif // OLEAUTO_H
  