Re: invoke COM function

From:

"Ivan Brugiolo [MSFT]" <ivanbrug@online.microsoft.com>

Newsgroups:

microsoft.public.vc.language

Date:

Fri, 21 Mar 2008 19:58:47 -0700

Message-ID:

<e8UIni8iIHA.4080@TK2MSFTNGP03.phx.gbl>

Maybe:

BSTR bstr = SysAllocString(L"aaa");
pIXMLBulkLoad->put_ConnectionString(bstr);

But, if you have such a question,
maybe you need to dust-off your C++ book first.

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"June Lee" <iiuu66@yahoo.com> wrote in message
news:qns8u35m2ps7qvsh4fkroodlsggjuuuls7@4ax.com...

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;

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