VB里怎样调用VC的COM接口中[out]类的参数,该如何解决

VB里怎样调用VC的COM接口中[out]类的参数
如题

[解决办法]
out的意思是输出参数
有out属性的参数必须是指针

C/C++ code

[id(1), helpstring("method TestMethod")] HRESULT TestMethod([out] BSTR* outstr, [out] double* outdbl, [out] IDispatch** outobj);STDMETHODIMP CTestClass::TestMethod(BSTR *outstr, double *outdbl, IDispatch **outobj){    *outstr = _bstr_t("你好!").copy();    *outdbl = 3.1415926;    _COM_SMARTPTR_TYPEDEF(IDispatch, __uuidof(IDispatch));    IDispatchPtr p;    p.CreateInstance("scripting.dictionary");    *outobj = p;    p.AddRef();    return S_OK;}