在C++中用WebBrowser控件调用JavaScript函数

主要函数 CallJScript
BOOL CallJScript(const wchar_t * func, VARIANT * vtParams, int cNumberOfParam, VARIANT * vtResult)
{
if(!func || !func[0])
return FALSE;
CComPtr<IDispatch> spScript;
spScript = GetJScript();
if(!spScript)
return FALSE;
DISPID dispID = NULL;
CComBSTR bstrFunc(func);
HRESULT hr = spScript->GetIDsOfNames(IID_NULL, &bstrFunc, 1, LOCALE_SYSTEM_DEFAULT, &dispID);
if(FAILED(hr))
return FALSE;
DISPPARAMS dispParams = {0};
dispParams.cArgs = cNumberOfParam;
dispParams.rgvarg = new VARIANT[cNumberOfParam];
for(int i = 0; i < cNumberOfParam; ++i)
{
VariantInit(&dispParams.rgvarg[i]);
VariantCopy(&dispParams.rgvarg[i], &vtParams[cNumberOfParam - 1 - i]);
}
hr = spScript->Invoke(dispID, IID_NULL, 0, DISPATCH_METHOD, &dispParams, vtResult, NULL, NULL);
delete [] dispParams.rgvarg;
if(FAILED(hr))
return FALSE;
return TRUE;
}
其它函数
IHTMLDocument2 * GetIDocument2()
{
if(!m_pWebBrowser2) return NULL;
IDispatch *pIDispatch = NULL;
if (SUCCEEDED(m_pWebBrowser2->get_Document(&pIDispatch)) && pIDispatch)
{
IHTMLDocument2 *pIDocument2 = NULL;
if (SUCCEEDED(pIDispatch->QueryInterface(IID_IHTMLDocument2, (void**)&pIDocument2)))
{
pIDispatch->Release();
return pIDocument2;
}
pIDispatch->Release();
}
return NULL;
}
IDispatch * GetJScript()
{
CComPtr<IHTMLDocument2> doc;
doc = GetIDocument2();
if(!doc)
return NULL;
IDispatch * dsScript = NULL;
HRESULT hr = doc->get_Script(&dsScript);
if(SUCCEEDED(hr) && dsScript)
return dsScript;
else
return NULL;
}