c++与js脚本交互,C++调用JS函数/JS调用C++函数(2/3)

本篇文章主要介绍了"c++与js脚本交互,C++调用JS函数/JS调用C++函数"，主要涉及到memset,javascript函数方面的内容，对于C/C++jrs看球网直播吧_低调看直播体育app软件下载_低调看体育直播感兴趣的同学可以参考一下： 一、javascript调用c,方法有两种方案1：1.html编写

// .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);
        //IDispatch
        STDMETHODIMP 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);
};
// .cpp
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 success
    hr = NOERROR;
        for ( i=0; i < cNames; i++) {
        CString cszName  = rgszNames[i];
                if (cszName == javaScriptName)
        {
            rgDispId[i] = DISPID_CallCppFromJs;
        }
        else {
            // One or more are unknown so set the return code accordingly
            hr = 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)
{
    CXXXDlg* pDlg = (CCppCallJsDlg*) AfxGetMainWnd();
    
    if (dispIdMember == DISPID_CallCppFromJs)
    {
        if (wFlags & DISPATCH_PROPERTYGET)
        {
            if (pVarResult != NULL)
            {
                VariantInit(pVarResult);
                V_VT(pVarResult)=VT_BOOL;
                V_BOOL(pVarResult)=true;
            }
        }
        if (wFlags & DISPATCH_METHOD)
        {
            CString cszArg1= pDispParams->rgvarg[0].bstrVal;
            pDlg->CallByScript(cszArg1);
        }
    }
    return S_OK;
}