note : get COM interface method address

/// @file       prjGetComInterfaceMethodAddr.cpp
/// @brief      得到COM接口方法地址

#include "stdafx.h" ///< 由 <WinInet.h> 包含COM接口定义
#include "prjGetComInterfaceMethodAddr.h"

/// 自己从C++接口定义中拷贝出来的C风格接口定义
/// 当前是C++程序，无法直接使用C风格接口定义
/// 使用C风格接口定义，是为了得到COM接口虚表中的方法地址
#include "ctype_interace.h"

#ifdef _DEBUG
#define new DEBUG_NEW
#endif

// The one and only application object

CWinApp theApp;

using namespace std;

/// 得到 IWebBrowser::get_LocationURL 的函数地址
ULONG_PTR GetComApiInterfaceAddr_IWebBrowser_get_LocationURL();

int _tmain(int argc, TCHAR* argv[], TCHAR* envp[])
{
    DWORD_PTR   dwAddr = 0;
	int         nRetCode = 0;

	HMODULE hModule = ::GetModuleHandle(NULL);

	if (hModule != NULL)
	{
		// initialize MFC and print and error on failure
		if (!AfxWinInit(hModule, NULL, ::GetCommandLine(), 0))
		{
			// TODO: change error code to suit your needs
			_tprintf(_T("Fatal Error: MFC initialization failed\n"));
			nRetCode = 1;
		}
		else
		{
			dwAddr = GetComApiInterfaceAddr_IWebBrowser_get_LocationURL();
            _tprintf(
                L"GetComApiInterfaceAddr_"
                L"IWebBrowser_get_LocationURL = 0x%X\r\n", 
                dwAddr);
		}
	}
	else
	{
		// TODO: change error code to suit your needs
		_tprintf(_T("Fatal Error: GetModuleHandle failed\n"));
		nRetCode = 1;
	}

    /** runresults
    GetComApiInterfaceAddr_IWebBrowser_get_LocationURL = 0x5D9C680C
    */
    getwchar();
	return nRetCode;
}

typedef HRESULT (STDMETHODCALLTYPE * PFN_get_LocationURL)( 
    IWebBrowser * This,
    BSTR *LocationURL);

DWORD_PTR GetComApiInterfaceAddr_IWebBrowser_get_LocationURL()
{
    DWORD_PTR   dwAddr = 0;
    HRESULT hr;
    IWebBrowser* pInterface = NULL;
    ctype_IWebBrowser * pCtypeInterface = NULL;
    PFN_get_LocationURL pfn_get_LocationURL = NULL;
    
    CoInitialize ( NULL );
    hr = CoCreateInstance ( CLSID_WebBrowser,
        NULL,
        CLSCTX_INPROC_SERVER,
        IID_IWebBrowser,
        (void**) &pInterface);

    if (SUCCEEDED(hr))
    {
        pCtypeInterface = (ctype_IWebBrowser *)pInterface;
        pfn_get_LocationURL = pCtypeInterface->lpVtbl->get_LocationURL;
        dwAddr = (DWORD_PTR)pfn_get_LocationURL;

        pInterface->Release();
    }

    CoUninitialize();

    return dwAddr;
}

// stdafx.h : include file for standard system include files,
// or project specific include files that are used frequently, but
// are changed infrequently
//

#pragma once

#include "targetver.h"

#include <stdio.h>
#include <tchar.h>
#define _ATL_CSTRING_EXPLICIT_CONSTRUCTORS      // some CString constructors will be explicit

#ifndef VC_EXTRALEAN
#define VC_EXTRALEAN            // Exclude rarely-used stuff from Windows headers
#endif

#include <afx.h>
#include <afxwin.h>         // MFC core and standard components
#include <WinInet.h>        ///< for COM Interface !
#include <afxext.h>         // MFC extensions
#ifndef _AFX_NO_OLE_SUPPORT
#include <afxdtctl.h>           // MFC support for Internet Explorer 4 Common Controls
#endif
#ifndef _AFX_NO_AFXCMN_SUPPORT
#include <afxcmn.h>                     // MFC support for Windows Common Controls
#endif // _AFX_NO_AFXCMN_SUPPORT

#include <iostream>

// TODO: reference additional headers your program requires here

/// @file       ctype_interace.h
/// @brief      C风格的接口与方法定义
///             在C++程序中, 为了使用COM接口的虚表指针, 
///             如果该COM接口为C++风格和C风格接口混合提供, 
///             需要将C风格的接口拷贝出来改名使用
///             直接包含头文件，无法编译通过

#ifndef __CTYPE_INTERACE_H__
#define __CTYPE_INTERACE_H__

/* C style interface */

typedef struct IWebBrowserVtbl
{
    BEGIN_INTERFACE

        HRESULT ( STDMETHODCALLTYPE *QueryInterface )( 
        __RPC__in IWebBrowser * This,
        /* [in] */ __RPC__in REFIID riid,
        /* [annotation][iid_is][out] */ 
        __RPC__deref_out  void **ppvObject);

        ULONG ( STDMETHODCALLTYPE *AddRef )( 
            __RPC__in IWebBrowser * This);

        ULONG ( STDMETHODCALLTYPE *Release )( 
            __RPC__in IWebBrowser * This);

        HRESULT ( STDMETHODCALLTYPE *GetTypeInfoCount )( 
            __RPC__in IWebBrowser * This,
            /* [out] */ __RPC__out UINT *pctinfo);

        HRESULT ( STDMETHODCALLTYPE *GetTypeInfo )( 
            __RPC__in IWebBrowser * This,
            /* [in] */ UINT iTInfo,
            /* [in] */ LCID lcid,
            /* [out] */ __RPC__deref_out_opt ITypeInfo **ppTInfo);

        HRESULT ( STDMETHODCALLTYPE *GetIDsOfNames )( 
            __RPC__in IWebBrowser * This,
            /* [in] */ __RPC__in REFIID riid,
            /* [size_is][in] */ __RPC__in_ecount_full(cNames) LPOLESTR *rgszNames,
            /* [range][in] */ __RPC__in_range(0,16384) UINT cNames,
            /* [in] */ LCID lcid,
            /* [size_is][out] */ __RPC__out_ecount_full(cNames) DISPID *rgDispId);

        /* [local] */ HRESULT ( STDMETHODCALLTYPE *Invoke )( 
            IWebBrowser * This,
            /* [in] */ DISPID dispIdMember,
            /* [in] */ REFIID riid,
            /* [in] */ LCID lcid,
            /* [in] */ WORD wFlags,
            /* [out][in] */ DISPPARAMS *pDispParams,
            /* [out] */ VARIANT *pVarResult,
            /* [out] */ EXCEPINFO *pExcepInfo,
            /* [out] */ UINT *puArgErr);

        /* [helpcontext][helpstring][id] */ HRESULT ( STDMETHODCALLTYPE *GoBack )( 
            __RPC__in IWebBrowser * This);

        /* [helpcontext][helpstring][id] */ HRESULT ( STDMETHODCALLTYPE *GoForward )( 
            __RPC__in IWebBrowser * This);

        /* [helpcontext][helpstring][id] */ HRESULT ( STDMETHODCALLTYPE *GoHome )( 
            __RPC__in IWebBrowser * This);

        /* [helpcontext][helpstring][id] */ HRESULT ( STDMETHODCALLTYPE *GoSearch )( 
            __RPC__in IWebBrowser * This);

        /* [helpcontext][helpstring][id] */ HRESULT ( STDMETHODCALLTYPE *Navigate )( 
            __RPC__in IWebBrowser * This,
            /* [in] */ __RPC__in BSTR URL,
            /* [unique][optional][in] */ __RPC__in_opt VARIANT *Flags,
            /* [unique][optional][in] */ __RPC__in_opt VARIANT *TargetFrameName,
            /* [unique][optional][in] */ __RPC__in_opt VARIANT *PostData,
            /* [unique][optional][in] */ __RPC__in_opt VARIANT *Headers);

        /* [helpcontext][helpstring][id] */ HRESULT ( STDMETHODCALLTYPE *Refresh )( 
            __RPC__in IWebBrowser * This);

        /* [helpcontext][helpstring][id] */ HRESULT ( STDMETHODCALLTYPE *Refresh2 )( 
            __RPC__in IWebBrowser * This,
            /* [unique][optional][in] */ __RPC__in_opt VARIANT *Level);

        /* [helpcontext][helpstring][id] */ HRESULT ( STDMETHODCALLTYPE *Stop )( 
            __RPC__in IWebBrowser * This);

        /* [helpcontext][helpstring][propget][id] */ HRESULT ( STDMETHODCALLTYPE *get_Application )( 
            __RPC__in IWebBrowser * This,
            /* [retval][out] */ __RPC__deref_out_opt IDispatch **ppDisp);

        /* [helpcontext][helpstring][propget][id] */ HRESULT ( STDMETHODCALLTYPE *get_Parent )( 
            __RPC__in IWebBrowser * This,
            /* [retval][out] */ __RPC__deref_out_opt IDispatch **ppDisp);

        /* [helpcontext][helpstring][propget][id] */ HRESULT ( STDMETHODCALLTYPE *get_Container )( 
            __RPC__in IWebBrowser * This,
            /* [retval][out] */ __RPC__deref_out_opt IDispatch **ppDisp);

        /* [helpcontext][helpstring][propget][id] */ HRESULT ( STDMETHODCALLTYPE *get_Document )( 
            __RPC__in IWebBrowser * This,
            /* [retval][out] */ __RPC__deref_out_opt IDispatch **ppDisp);

        /* [helpcontext][helpstring][propget][id] */ HRESULT ( STDMETHODCALLTYPE *get_TopLevelContainer )( 
            __RPC__in IWebBrowser * This,
            /* [retval][out] */ __RPC__out VARIANT_BOOL *pBool);

        /* [helpcontext][helpstring][propget][id] */ HRESULT ( STDMETHODCALLTYPE *get_Type )( 
            __RPC__in IWebBrowser * This,
            /* [retval][out] */ __RPC__deref_out_opt BSTR *Type);

        /* [helpcontext][helpstring][propget][id] */ HRESULT ( STDMETHODCALLTYPE *get_Left )( 
            __RPC__in IWebBrowser * This,
            /* [retval][out] */ __RPC__out long *pl);

        /* [propput][id] */ HRESULT ( STDMETHODCALLTYPE *put_Left )( 
            __RPC__in IWebBrowser * This,
            /* [in] */ long Left);

        /* [helpcontext][helpstring][propget][id] */ HRESULT ( STDMETHODCALLTYPE *get_Top )( 
            __RPC__in IWebBrowser * This,
            /* [retval][out] */ __RPC__out long *pl);

        /* [propput][id] */ HRESULT ( STDMETHODCALLTYPE *put_Top )( 
            __RPC__in IWebBrowser * This,
            /* [in] */ long Top);

        /* [helpcontext][helpstring][propget][id] */ HRESULT ( STDMETHODCALLTYPE *get_Width )( 
            __RPC__in IWebBrowser * This,
            /* [retval][out] */ __RPC__out long *pl);

        /* [propput][id] */ HRESULT ( STDMETHODCALLTYPE *put_Width )( 
            __RPC__in IWebBrowser * This,
            /* [in] */ long Width);

        /* [helpcontext][helpstring][propget][id] */ HRESULT ( STDMETHODCALLTYPE *get_Height )( 
            __RPC__in IWebBrowser * This,
            /* [retval][out] */ __RPC__out long *pl);

        /* [propput][id] */ HRESULT ( STDMETHODCALLTYPE *put_Height )( 
            __RPC__in IWebBrowser * This,
            /* [in] */ long Height);

        /* [helpcontext][helpstring][propget][id] */ HRESULT ( STDMETHODCALLTYPE *get_LocationName )( 
            __RPC__in IWebBrowser * This,
            /* [retval][out] */ __RPC__deref_out_opt BSTR *LocationName);

        /* [helpcontext][helpstring][propget][id] */ HRESULT ( STDMETHODCALLTYPE *get_LocationURL )( 
            __RPC__in IWebBrowser * This,
            /* [retval][out] */ __RPC__deref_out_opt BSTR *LocationURL);

        /* [helpcontext][helpstring][propget][id] */ HRESULT ( STDMETHODCALLTYPE *get_Busy )( 
            __RPC__in IWebBrowser * This,
            /* [retval][out] */ __RPC__out VARIANT_BOOL *pBool);

    END_INTERFACE
} IWebBrowserVtbl;

interface ctype_IWebBrowser ///< 改名了
{
    CONST_VTBL struct IWebBrowserVtbl *lpVtbl;
};

#endif