分3步：

一》实现IDispatch 接口

　　

#ifndef _IDISPIMP_H_
#define _IDISPIMP_H_// idispimp.h
class CImpIDispatch : public IDispatch
{
protected:ULONG               m_cRef;public:CImpIDispatch(void);~CImpIDispatch(void);STDMETHODIMP QueryInterface(REFIID, void **);STDMETHODIMP_(ULONG) AddRef(void);STDMETHODIMP_(ULONG) Release(void);//IDispatchSTDMETHODIMP GetTypeInfoCount(UINT* pctinfo);STDMETHODIMP GetTypeInfo(/* [in] */ UINT iTInfo,/* [in] */ LCID lcid,/* [out] */ ITypeInfo** ppTInfo);STDMETHODIMP GetIDsOfNames(/* [in] */ REFIID riid,/* [size_is][in] */ LPOLESTR *rgszNames,/* [in] */ UINT cNames,/* [in] */ LCID lcid,/* [size_is][out] */ DISPID *rgDispId);STDMETHODIMP Invoke(/* [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);};#endif

#include "StdAfx.h"#include "testDlg.h" // 这个是MFC对话框的头文件,在后面用于调用函数的

#include "Idispimp.h"#include <atlbase.h>#include <mmsystem.h>
#include <shlwapi.h>#pragma comment(lib ,"shlwapi.lib")CString javaScriptName="JavaScriptCallCpp";    // javascript 传入的函数名
#define DISPID_CallCppFromJs 1                //与函数名绑定的IDCImpIDispatch::CImpIDispatch( void )
{m_cRef = 0;
}CImpIDispatch::~CImpIDispatch( void )
{ASSERT( m_cRef == 0 );
}STDMETHODIMP CImpIDispatch::QueryInterface( REFIID riid, void **ppv )
{*ppv = NULL;if ( IID_IDispatch == riid ){*ppv = this;}if ( NULL != *ppv ){((LPUNKNOWN)*ppv)->AddRef();return NOERROR;}return E_NOINTERFACE;
}STDMETHODIMP_(ULONG) CImpIDispatch::AddRef(void)
{return ++m_cRef;
}STDMETHODIMP_(ULONG) CImpIDispatch::Release(void)
{return --m_cRef;
}//IDispatch
STDMETHODIMP CImpIDispatch::GetTypeInfoCount(UINT* /*pctinfo*/)
{return E_NOTIMPL;
}STDMETHODIMP CImpIDispatch::GetTypeInfo(/* [in] */ UINT /*iTInfo*/,/* [in] */ LCID /*lcid*/,/* [out] */ ITypeInfo** /*ppTInfo*/)
{return E_NOTIMPL;
}STDMETHODIMP CImpIDispatch::GetIDsOfNames(/* [in] */ REFIID riid,/* [size_is][in] */ OLECHAR** rgszNames,/* [in] */ UINT cNames,/* [in] */ LCID lcid,/* [size_is][out] */ DISPID* rgDispId)
{HRESULT hr;UINT    i;// Assume some degree of successhr = NOERROR;for ( i=0; i < cNames; i++) {CString cszName;cszName = rgszNames[i];if (cszName == javaScriptName)//这里判断是否是JS传入的参数名
        {rgDispId[i] = DISPID_CallCppFromJs;//将ID绑定，用于Invoke
            }else {// One or more are unknown so set the return code accordinglyhr = ResultFromScode(DISP_E_UNKNOWNNAME);rgDispId[i] = DISPID_UNKNOWN;}}return hr;
}STDMETHODIMP CImpIDispatch::Invoke(/* [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)
{CtestDlg* pDlg = (CtestDlg*) AfxGetMainWnd();/*参数wFlags有下面若干值----Value                    DescriptionDISPATCH_METHOD            表示将调用方法。如果属性名称和方法名称相同，则和DISPATCH_PROPERTYGET标志一起设置。DISPATCH_PROPERTYGET    获得属性DISPATCH_PROPERTYPUT    设置属性DISPATCH_PROPERTYPUTREF    通过引用设置属性*/if (dispIdMember == DISPID_CallCppFromJs)//
    {if (wFlags & DISPATCH_PROPERTYGET)//获取属性
        {if (pVarResult != NULL){VariantInit(pVarResult);V_VT(pVarResult)=VT_BOOL;V_BOOL(pVarResult)=true;}}if (wFlags & DISPATCH_METHOD)//这里进行调用
        {CString cszArg1;cszArg1 = pDispParams->rgvarg[0].bstrVal;//这里是传入参数
pDlg->TestHtml();// 调用测试的函数
        }}return S_OK;
}

二》改成COleControlSit

// Custsite.h
#ifndef __CUSTOMSITEH__
#define __CUSTOMSITEH__#include "Idispimp.h"
#include <afxocc.h>
#include <Mshtmhst.h>
class CCustomControlSite:public COleControlSite
{
public:CCustomControlSite(COleControlContainer *pCnt):COleControlSite(pCnt){}BEGIN_INTERFACE_PART(DocHostShowUI, IDocHostShowUI)INIT_INTERFACE_PART(CDocHostSite, DocHostShowUI)STDMETHOD(ShowHelp)(/* [in ] */    HWND hwnd,/* [in ] */    LPOLESTR pszHelpFile,/* [in ] */    UINT uCommand,/* [in ] */    DWORD dwData,/* [in ] */    POINT ptMouse,/* [out] */    IDispatch __RPC_FAR *pDispatchObjectHit);STDMETHOD(ShowMessage)(/* [in ] */    HWND hwnd,/* [in ] */    LPOLESTR lpstrText,/* [in ] */    LPOLESTR lpstrCaption,/* [in ] */    DWORD dwType,/* [in ] */    LPOLESTR lpstrHelpFile,/* [in ] */    DWORD dwHelpContext,/* [out] */    LRESULT __RPC_FAR *plResult);END_INTERFACE_PART(DocHostShowUI)protected:DECLARE_INTERFACE_MAP();BEGIN_INTERFACE_PART(DocHostUIHandler, IDocHostUIHandler)STDMETHOD(ShowContextMenu)(/* [in] */ DWORD dwID,/* [in] */ POINT __RPC_FAR *ppt,/* [in] */ IUnknown __RPC_FAR *pcmdtReserved,/* [in] */ IDispatch __RPC_FAR *pdispReserved);STDMETHOD(GetHostInfo)( /* [out][in] */ DOCHOSTUIINFO __RPC_FAR *pInfo);STDMETHOD(ShowUI)( /* [in] */ DWORD dwID,/* [in] */ IOleInPlaceActiveObject __RPC_FAR *pActiveObject,/* [in] */ IOleCommandTarget __RPC_FAR *pCommandTarget,/* [in] */ IOleInPlaceFrame __RPC_FAR *pFrame,/* [in] */ IOleInPlaceUIWindow __RPC_FAR *pDoc);STDMETHOD(HideUI)(void);STDMETHOD(UpdateUI)(void);STDMETHOD(EnableModeless)(/* [in] */ BOOL fEnable);STDMETHOD(OnDocWindowActivate)(/* [in] */ BOOL fEnable);STDMETHOD(OnFrameWindowActivate)(/* [in] */ BOOL fEnable);STDMETHOD(ResizeBorder)( /* [in] */ LPCRECT prcBorder,/* [in] */ IOleInPlaceUIWindow __RPC_FAR *pUIWindow,/* [in] */ BOOL fRameWindow);STDMETHOD(TranslateAccelerator)( /* [in] */ LPMSG lpMsg,/* [in] */ const GUID __RPC_FAR *pguidCmdGroup,/* [in] */ DWORD nCmdID);STDMETHOD(GetOptionKeyPath)( /* [out] */ LPOLESTR __RPC_FAR *pchKey,/* [in] */ DWORD dw);STDMETHOD(GetDropTarget)(/* [in] */ IDropTarget __RPC_FAR *pDropTarget,/* [out] */ IDropTarget __RPC_FAR *__RPC_FAR *ppDropTarget);STDMETHOD(GetExternal)( /* [out] */ IDispatch __RPC_FAR *__RPC_FAR *ppDispatch);STDMETHOD(TranslateUrl)( /* [in] */ DWORD dwTranslate,/* [in] */ OLECHAR __RPC_FAR *pchURLIn,/* [out] */ OLECHAR __RPC_FAR *__RPC_FAR *ppchURLOut);STDMETHOD(FilterDataObject)( /* [in] */ IDataObject __RPC_FAR *pDO,/* [out] */ IDataObject __RPC_FAR *__RPC_FAR *ppDORet);END_INTERFACE_PART(DocHostUIHandler)
};class CCustomOccManager :public COccManager
{
public:CCustomOccManager(){}COleControlSite* CreateSite(COleControlContainer* pCtrlCont){CCustomControlSite *pSite = new CCustomControlSite(pCtrlCont);return pSite;}
};
#endif

#include "StdAfx.h"
#include "Custsite.h"
#include "test.h" // 主要用到 theApp (261行)

BEGIN_INTERFACE_MAP(CCustomControlSite, COleControlSite)INTERFACE_PART(CCustomControlSite, IID_IDocHostShowUI, DocHostShowUI)INTERFACE_PART(CCustomControlSite, IID_IDocHostUIHandler, DocHostUIHandler)
END_INTERFACE_MAP()ULONG CCustomControlSite::XDocHostShowUI::AddRef()
{METHOD_PROLOGUE(CCustomControlSite, DocHostShowUI);return pThis->ExternalAddRef();
}ULONG CCustomControlSite::XDocHostShowUI::Release()
{METHOD_PROLOGUE(CCustomControlSite, DocHostShowUI);return pThis->ExternalRelease();
}HRESULT CCustomControlSite::XDocHostShowUI::QueryInterface(REFIID riid, void ** ppvObj)
{METHOD_PROLOGUE(CCustomControlSite, DocHostShowUI);return pThis->ExternalQueryInterface( &riid, ppvObj );
}HRESULT CCustomControlSite::XDocHostShowUI::ShowHelp(HWND hwnd,LPOLESTR pszHelpFile,UINT nCommand,DWORD dwData,POINT ptMouse,IDispatch * pDispatchObjectHit)
{METHOD_PROLOGUE(CCustomControlSite, DocHostShowUI);return S_OK;
}HRESULT CCustomControlSite::XDocHostShowUI::ShowMessage(HWND hwnd,LPOLESTR lpstrText,LPOLESTR lpstrCaption,DWORD dwType,LPOLESTR lpstrHelpFile,DWORD dwHelpContext,LRESULT * plResult)
{METHOD_PROLOGUE(CCustomControlSite, DocHostShowUI);MessageBox(hwnd, (CString)lpstrText, _T("Cpp & JavaScript"), /*dwType*/MB_ICONWARNING);return S_OK;
}ULONG FAR EXPORT  CCustomControlSite::XDocHostUIHandler::AddRef()
{METHOD_PROLOGUE(CCustomControlSite, DocHostUIHandler)return pThis->ExternalAddRef();
}ULONG FAR EXPORT  CCustomControlSite::XDocHostUIHandler::Release()
{                            METHOD_PROLOGUE(CCustomControlSite, DocHostUIHandler)return pThis->ExternalRelease();
}HRESULT FAR EXPORT  CCustomControlSite::XDocHostUIHandler::QueryInterface(REFIID riid, void **ppvObj)
{METHOD_PROLOGUE(CCustomControlSite, DocHostUIHandler)HRESULT hr = (HRESULT)pThis->ExternalQueryInterface(&riid, ppvObj);return hr;
}// * CImpIDocHostUIHandler::GetHostInfo
// *
// * Purpose: Called at initialization
// *
HRESULT FAR EXPORT  CCustomControlSite::XDocHostUIHandler::GetHostInfo( DOCHOSTUIINFO* pInfo )
{METHOD_PROLOGUE(CCustomControlSite, DocHostUIHandler)pInfo->dwFlags = DOCHOSTUIFLAG_NO3DBORDER;pInfo->dwDoubleClick = DOCHOSTUIDBLCLK_DEFAULT;return S_OK;
}// * CImpIDocHostUIHandler::ShowUI
// *
// * Purpose: Called when MSHTML.DLL shows its UI
// *
HRESULT FAR EXPORT  CCustomControlSite::XDocHostUIHandler::ShowUI(DWORD dwID, IOleInPlaceActiveObject * /*pActiveObject*/,IOleCommandTarget * pCommandTarget,IOleInPlaceFrame * /*pFrame*/,IOleInPlaceUIWindow * /*pDoc*/)
{METHOD_PROLOGUE(CCustomControlSite, DocHostUIHandler)// We've already got our own UI in place so just return S_OKreturn S_OK;
}// * CImpIDocHostUIHandler::HideUI
// *
// * Purpose: Called when MSHTML.DLL hides its UI
// *
HRESULT FAR EXPORT  CCustomControlSite::XDocHostUIHandler::HideUI(void)
{METHOD_PROLOGUE(CCustomControlSite, DocHostUIHandler)return S_OK;
}// * CImpIDocHostUIHandler::UpdateUI
// *
// * Purpose: Called when MSHTML.DLL updates its UI
// *
HRESULT FAR EXPORT  CCustomControlSite::XDocHostUIHandler::UpdateUI(void)
{METHOD_PROLOGUE(CCustomControlSite, DocHostUIHandler)// MFC is pretty good about updating it's UI in it's Idle loop so I don't do anything herereturn S_OK;
}// * CImpIDocHostUIHandler::EnableModeless
// *
// * Purpose: Called from MSHTML.DLL's IOleInPlaceActiveObject::EnableModeless
// *
HRESULT FAR EXPORT  CCustomControlSite::XDocHostUIHandler::EnableModeless(BOOL /*fEnable*/)
{METHOD_PROLOGUE(CCustomControlSite, DocHostUIHandler)return E_NOTIMPL;
}// * CImpIDocHostUIHandler::OnDocWindowActivate
// *
// * Purpose: Called from MSHTML.DLL's IOleInPlaceActiveObject::OnDocWindowActivate
// *
HRESULT FAR EXPORT  CCustomControlSite::XDocHostUIHandler::OnDocWindowActivate(BOOL /*fActivate*/)
{METHOD_PROLOGUE(CCustomControlSite, DocHostUIHandler)return E_NOTIMPL;
}// * CImpIDocHostUIHandler::OnFrameWindowActivate
// *
// * Purpose: Called from MSHTML.DLL's IOleInPlaceActiveObject::OnFrameWindowActivate
// *
HRESULT FAR EXPORT  CCustomControlSite::XDocHostUIHandler::OnFrameWindowActivate(BOOL /*fActivate*/)
{METHOD_PROLOGUE(CCustomControlSite, DocHostUIHandler)return E_NOTIMPL;
}// * CImpIDocHostUIHandler::ResizeBorder
// *
// * Purpose: Called from MSHTML.DLL's IOleInPlaceActiveObject::ResizeBorder
// *
HRESULT FAR EXPORT  CCustomControlSite::XDocHostUIHandler::ResizeBorder(LPCRECT /*prcBorder*/, IOleInPlaceUIWindow* /*pUIWindow*/,BOOL /*fRameWindow*/)
{METHOD_PROLOGUE(CCustomControlSite, DocHostUIHandler)return E_NOTIMPL;
}// * CImpIDocHostUIHandler::ShowContextMenu
// *
// * Purpose: Called when MSHTML.DLL would normally display its context menu
// *
HRESULT FAR EXPORT  CCustomControlSite::XDocHostUIHandler::ShowContextMenu(DWORD /*dwID*/, POINT* pptPosition,IUnknown* /*pCommandTarget*/,IDispatch* /*pDispatchObjectHit*/)
{METHOD_PROLOGUE(CCustomControlSite, DocHostUIHandler)return E_NOTIMPL;//CMenu menu;//menu.LoadMenu(IDR_CUSTOM_POPUP);//CMenu* pSubMenu = menu.GetSubMenu(0);////Because we passed in theApp.m_pMainWnd all of our////WM_COMMAND handlers for the menu items must be handled////in CCustomBrowserApp. If you want this to be your dialog////you will have to grab a pointer to your dialog class and ////pass the hWnd of it into the last parameter in this call//pSubMenu->TrackPopupMenu(TPM_LEFTALIGN|TPM_RIGHTBUTTON, pptPosition->x, pptPosition->y, theApp.m_pMainWnd);return S_OK; // We've shown our own context menu. MSHTML.DLL will no longer try to show its own.
}// * CImpIDocHostUIHandler::TranslateAccelerator
// *
// * Purpose: Called from MSHTML.DLL's TranslateAccelerator routines
// *
HRESULT FAR EXPORT  CCustomControlSite::XDocHostUIHandler::TranslateAccelerator(LPMSG lpMsg,/* [in] */ const GUID __RPC_FAR *pguidCmdGroup,/* [in] */ DWORD nCmdID)
{METHOD_PROLOGUE(CCustomControlSite, DocHostUIHandler)//disable F5if(lpMsg->message == WM_KEYDOWN && GetAsyncKeyState(VK_F5) < 0)return S_OK;if(GetKeyState(VK_CONTROL) & 0x8000){//disable ctrl + Oif(lpMsg->message == WM_KEYDOWN && GetAsyncKeyState(0x4F) < 0)return S_OK;//disable ctrl + pif(lpMsg->message == WM_KEYDOWN && GetAsyncKeyState(0x50) < 0)return S_OK;//disable ctrl + Nif(lpMsg->message == WM_KEYDOWN && GetAsyncKeyState(0x4E) < 0)return S_OK;}//disable back spaceif(lpMsg->wParam == VK_BACK)return S_OK;return S_FALSE;
}// * CImpIDocHostUIHandler::GetOptionKeyPath
// *
// * Purpose: Called by MSHTML.DLL to find where the host wishes to store
// *    its options in the registry
// *
HRESULT FAR EXPORT  CCustomControlSite::XDocHostUIHandler::GetOptionKeyPath(BSTR* pbstrKey, DWORD)
{METHOD_PROLOGUE(CCustomControlSite, DocHostUIHandler)return E_NOTIMPL;
}STDMETHODIMP CCustomControlSite::XDocHostUIHandler::GetDropTarget( /* [in] */ IDropTarget __RPC_FAR *pDropTarget,/* [out] */ IDropTarget __RPC_FAR *__RPC_FAR *ppDropTarget)
{METHOD_PROLOGUE(CCustomControlSite, DocHostUIHandler)return E_NOTIMPL;
}STDMETHODIMP CCustomControlSite::XDocHostUIHandler::GetExternal( /* [out] */ IDispatch __RPC_FAR *__RPC_FAR *ppDispatch)
{// return the IDispatch we have for extending the object ModelIDispatch* pDisp = (IDispatch*)theApp.m_pDispOM; //这里pDisp->AddRef();*ppDispatch = pDisp;return S_OK;
}STDMETHODIMP CCustomControlSite::XDocHostUIHandler::TranslateUrl( /* [in] */ DWORD dwTranslate,/* [in] */ OLECHAR __RPC_FAR *pchURLIn,/* [out] */ OLECHAR __RPC_FAR *__RPC_FAR *ppchURLOut)
{METHOD_PROLOGUE(CCustomControlSite, DocHostUIHandler)return E_NOTIMPL;
}STDMETHODIMP CCustomControlSite::XDocHostUIHandler::FilterDataObject( /* [in] */ IDataObject __RPC_FAR *pDO,/* [out] */ IDataObject __RPC_FAR *__RPC_FAR *ppDORet)
{METHOD_PROLOGUE(CCustomControlSite, DocHostUIHandler)return E_NOTIMPL;
}

三》修改App

　　1.增加头文件  #include "Custsite.h"

　　 2.在 InitInstance()函数中 增加2处，修改一处

　　　　新增的两处

    CCustomOccManager *pMgr = new CCustomOccManager;m_pDispOM = new CImpIDispatch;

　　　　修改的一处

把AfxEnableControlContainer();改为
AfxEnableControlContainer(pMgr);

四》htm文件为:

<!DOCTYPE html>
<html>
<head><meta charset=gb2312><title></title><script type="text/javascript">function CallCpp(){//JavaScriptCallCpp 是C++中函数，//与idispimp.cpp文件中javaScriptName进行对应并且与DISPID_CallCppFromJs进行绑定window.external.JavaScriptCallCpp('This is a test for call C++ in JavaScript');}</script>
</head>
<body><button οnclick="CallCpp()">JavaScript访问C++代码</button>
</body>
</html>

五: 整个完成了

转载于:https://www.cnblogs.com/dengpeng1004/p/5236717.html

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