IENUM.H

/* 
 * IENUM0.H 
 * 
 * Definition of an IEnumRECT interface as an example of OLE 
 * interfaces as they appear in C and C++. 
 * 
 * Copyright (c)1993-1995 Microsoft Corporation, All Rights Reserved 
 * 
 * Kraig Brockschmidt, Microsoft 
 * Internet  :  kraigb@microsoft.com 
 * Compuserve:  >INTERNET:kraigb@microsoft.com 
 */ 
 
 
#ifndef _IENUM0_H_ 
#define _IENUM0_H_ 
 
 
//C++ Definition of an interface. 
#ifdef __cplusplus 
 
typedef struct IEnumRECT IEnumRECT; 
typedef IEnumRECT *PENUMRECT; 
 
 
//This is the interface:  a struct of pure virtual functions. 
struct IEnumRECT 
    { 
    STDMETHOD(QueryInterface)(REFIID, PPVOID)=0; 
    STDMETHOD_(ULONG,AddRef)(void)=0; 
    STDMETHOD_(ULONG,Release)(void)=0; 
    STDMETHOD(Next)(DWORD, LPRECT, LPDWORD)=0; 
    STDMETHOD(Skip)(DWORD)=0; 
    STDMETHOD(Reset)(void)=0; 
    STDMETHOD(Clone)(PENUMRECT *)=0; 
    }; 
 
#else   //!__cplusplus 
 
/* 
 * A C interface is explicitly a structure containing a long 
 * pointer to a virtual function table that we have to 
 * initialize explicitly. 
 */ 
 
typedef struct 
    { 
    struct IEnumRECTVtbl FAR *lpVtbl; 
    } IEnumRECT, *PENUMRECT; 
 
//This is just a convenient naming 
typedef struct IEnumRECTVtbl IEnumRECTVtbl; 
 
 
struct IEnumRECTVtbl 
    { 
    STDMETHOD(QueryInterface)(PENUMRECT, REFIID, PPVOID); 
    STDMETHOD_(ULONG, AddRef)(PENUMRECT); 
    STDMETHOD_(ULONG, Release)(PENUMRECT); 
    STDMETHOD(Next)(PENUMRECT, DWORD, LPRECT, LPDWORD); 
    STDMETHOD(Skip)(PENUMRECT, DWORD); 
    STDMETHOD(Reset)(PENUMRECT); 
    STDMETHOD(Clone)(PENUMRECT, PENUMRECT *); 
    }; 
 
#endif  //!__cplusplus 
 
#endif //_IENUM0_H_