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Ê×ÏÈ£¬ÊµÏÖÒ»¸öIDispatch½Ó¿Ú£¬µ±JSµ÷ÓÃC++º¯Êýʱ£¬ÏµÍ³»áµ÷ÓÃGetIDsOfNamesÀ´Óú¯ÊýÃûÈ¡µÃº¯ÊýµÄDISPID£¬È»ºóµ÷ÓÃInvokeÍê³ÉÕæÕýµÄµ÷Óã¬ÐèҪעÒâµÄÊÇInvokeµÄpDispParamsÖеIJÎÊýÊǵ¹ÐòµÄ¡£´úÂëÈçÏ£º
class CExtenalDispatch : public IDispatch
{
public:
CExtenalDispatch()
{
m_dwRef = 0;
}
~CExtenalDispatch()
{
}

STDMETHOD_(ULONG, AddRef)()
{
return InterlockedIncrement(&m_dwRef);
}
STDMETHOD_(ULONG, Release)()
{
unsigned long l = InterlockedDecrement(&m_dwRef);
if(l == 0)
delete this;
return l;
}
STDMETHOD(QueryInterface)(REFIID iid, LPVOID far* ppvObject)
{
HRESULT hrRet = S_OK;
*ppvObject = NULL;
if(IsEqualIID(iid, IID_IDispatch))
*ppvObject = (IDispatch*)this;
else
hrRet = E_NOINTERFACE;
if (S_OK == hrRet)
((IUnknown*)*ppvObject)->AddRef();
return hrRet;
}
STDMETHOD(GetTypeInfoCount)(UINT* pctinfo)
{
return E_NOTIMPL;
}
STDMETHOD(GetTypeInfo)(/* [in] */ UINT iTInfo,
/* [in] */ LCID lcid,
/* [out] */ ITypeInfo** ppTInfo)
{
return E_NOTIMPL;
}
STDMETHOD(GetIDsOfNames)(
/* [in] */ REFIID riid,
/* [size_is][in] */ LPOLESTR *rgszNames,
/* [in] */ UINT cNames,
/* [in] */ LCID lcid,
/* [size_is][out] */ DISPID *rgDispId)
{
HRESULT hr = S_OK;
for (int i = 0; i < (int)cNames; i++)
{
CString cszName = rgszNames[i];
if(cszName == L"myfunction")
{
bFind = TRUE;
rgDispId[i] = 1;
break;
}
else
{
// One or more are unknown so set the return code accordingly
hr = ResultfromScode(DISP_E_UNKNOWNNAME);
rgDispId[i] = DISPID_UNKNOWN;
}
}
return hr;
}

STDMETHOD(Invoke)(
/* [in] */ DISPID dispIdMember,
/* [in] */ REFIID riid,
/* [in] */ LCID lcid,
/* [in] */ WORD wFlags,
/* [out][in] */ DISPPARAMS *pDispParams,
/* [out] */ VARIANT *pVarResult,
/* [out] */ EXCEPINFO


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