DATAOBJ.H

///////////////////////////////////////////////////////////////////////////// 
// dataobj.h : IDataObject Interface to communicate data 
// 
// This is a part of the MMC SDK. 
// Copyright (C) 1997 Microsoft Corporation 
// All rights reserved. 
// 
// This source code is only intended as a supplement to the 
// MMC SDK Reference and related 
// electronic documentation provided with the library. 
// See these sources for detailed information regarding the 
// MMC Library product. 
// 
 
#ifndef __DATAOBJ_H_ 
#define __DATAOBJ_H_ 
 
#include <mmc.h> 
 
// 
// Defines, Types etc... 
// 
 
typedef enum tagCOOKIETYPE 
{ 
    COOKIE_IS_ROOT, 
    COOKIE_IS_STATUS 
} COOKIETYPE; 
 
class CComponentData; // Forward declaration 
 
 
///////////////////////////////////////////////////////////////////////////// 
// CDataObject - This class is used to pass data back and forth with MMC. It 
//               uses a standard interface, IDataObject to acomplish this. 
//                Refer to OLE documentation for a description of clipboard 
//               formats and the IDataObject interface. 
 
class CDataObject: 
    public IDataObject, 
    public CComObjectRoot 
{ 
public: 
 
// ATL Maps 
DECLARE_NOT_AGGREGATABLE(CDataObject) 
 
BEGIN_COM_MAP(CDataObject) 
COM_INTERFACE_ENTRY(IDataObject) 
END_COM_MAP() 
 
 
    CDataObject(); 
   ~CDataObject(); 
 
    VOID SetCookie(ULONG ulCookie, DATA_OBJECT_TYPES Type, COOKIETYPE ct); 
  
    //  
    // IUnknown overrides 
    // 
 
    STDMETHOD(QueryInterface) (REFIID riid, LPVOID FAR* ppvObj); 
    STDMETHOD_(ULONG, AddRef) (); 
    STDMETHOD_(ULONG, Release) (); 
 
    // 
    // IDataObject overrides 
    // 
 
    STDMETHOD(GetDataHere) (FORMATETC *pformatetc, 
                          STGMEDIUM *pmedium); 
  
 
// Not Implemented 
private: 
    STDMETHOD(GetData)(LPFORMATETC lpFormatetcIn, LPSTGMEDIUM lpMedium) 
    { return E_NOTIMPL; }; 
 
    STDMETHOD(EnumFormatEtc)(DWORD dwDirection, LPENUMFORMATETC* ppEnumFormatEtc) 
    { return E_NOTIMPL; }; 
 
    STDMETHOD(QueryGetData)(LPFORMATETC lpFormatetc)  
    { return E_NOTIMPL; }; 
 
    STDMETHOD(GetCanonicalFormatEtc)(LPFORMATETC lpFormatetcIn, LPFORMATETC lpFormatetcOut) 
    { return E_NOTIMPL; }; 
 
    STDMETHOD(SetData)(LPFORMATETC lpFormatetc, LPSTGMEDIUM lpMedium, BOOL bRelease) 
    { return E_NOTIMPL; }; 
 
    STDMETHOD(DAdvise)(LPFORMATETC lpFormatetc, DWORD advf, 
                LPADVISESINK pAdvSink, LPDWORD pdwConnection) 
    { return E_NOTIMPL; }; 
     
    STDMETHOD(DUnadvise)(DWORD dwConnection) 
    { return E_NOTIMPL; }; 
 
    STDMETHOD(EnumDAdvise)(LPENUMSTATDATA* ppEnumAdvise) 
    { return E_NOTIMPL; }; 
 
    // 
    // Non-interface member functions 
    // 
public: 
    DATA_OBJECT_TYPES GetContext() { return m_Context;  } 
    COOKIETYPE GetCookieType()     { return m_Type;     }  
    ULONG CDataObject::GetCookie() { return m_ulCookie; } 
 
private: 
    HRESULT _WriteInternal(IStream *pstm); 
    HRESULT _WriteDisplayName(IStream *pstm); 
    HRESULT _WriteNodeType(IStream *pstm); 
    HRESULT _WriteClsid(IStream *pstm); 
 
    ULONG               m_cRefs;     // object refcount 
    ULONG               m_ulCookie;  // what this obj refers to 
    DATA_OBJECT_TYPES   m_Context;   // context in which this was created 
    COOKIETYPE          m_Type;      // how to interpret _ulCookie 
    CComponentData     *m_pcd;       // NULL if created by csnapin 
 
public: 
    static UINT s_cfInternal;       // Our custom clipboard format 
    static UINT s_cfDisplayName;    // Our test for a node 
    static UINT s_cfNodeType; 
    static UINT s_cfSnapinClsid; 
}; 
 
#endif // __DATAOBJ_H_