IENUMFE.H

/* 
 * IENUMFE.H 
 * 
 * Definitions of a FORMATETC enumerator. 
 * 
 * Copyright (c)1993-1996 Microsoft Corporation, All Right Reserved 
 * 
 * Kraig Brockschmidt, Software Design Engineer 
 * Microsoft Systems Developer Relations 
 * 
 * Internet  :  kraigb@microsoft.com 
 * Compuserve:  >INTERNET:kraigb@microsoft.com 
 */ 
 
 
#ifndef _IENUMFE_H_ 
#define _IENUMFE_H_ 
 
/* 
 * IEnumFORMATETC object that is created from 
 * IDataObject::EnumFormatEtc.  This object lives on its own, 
 * that is, QueryInterface only knows IUnknown and IEnumFormatEtc, 
 * nothing more.  We still use an outer unknown for reference 
 * counting, because as long as this enumerator lives, the data 
 * object should live, thereby keeping the application up. 
 */ 
 
class CEnumFormatEtc; 
typedef class CEnumFormatEtc *PCEnumFormatEtc; 
 
class CEnumFormatEtc : public IEnumFORMATETC 
    { 
    private: 
        ULONG           m_cRef;     //Object reference count 
        LPUNKNOWN       m_pUnkRef;  //IUnknown for ref counting 
        ULONG           m_iCur;     //Current element 
        ULONG           m_cfe;      //Number of FORMATETCs in us 
        LPFORMATETC     m_prgfe;    //Source of FORMATETCs 
 
    public: 
        CEnumFormatEtc(LPUNKNOWN, ULONG, LPFORMATETC); 
        ~CEnumFormatEtc(void); 
 
        //IUnknown members that delegate to m_pUnkRef. 
        STDMETHODIMP         QueryInterface(REFIID, LPVOID *); 
        STDMETHODIMP_(ULONG) AddRef(void); 
        STDMETHODIMP_(ULONG) Release(void); 
 
        //IEnumFORMATETC members 
        STDMETHODIMP Next(ULONG, LPFORMATETC, ULONG *); 
        STDMETHODIMP Skip(ULONG); 
        STDMETHODIMP Reset(void); 
        STDMETHODIMP Clone(IEnumFORMATETC **); 
    }; 
 
 
#endif //_IENUMFE_H_