Re: Sharing an ADO connection object between two processes ?

"Herby" <>
9 Oct 2006 01:48:53 -0700
Brian Muth wrote:

     HRESULT result = conn->QueryInterface(__uuidof(

Change to ADODB::_Connection


Thanks Brian, that made the difference.

If i pass the connection object in process to the following:

BYTE CServerDoc::SetConnect(IUnknown* conn)

    ADOConnection* piTmpConnection;

HRESULT result = conn->QueryInterface(IID_IADOConnection,(LPVOID

if( result == E_NOINTERFACE )
   return 0;

if( result == S_OK ){
    ADORecordset* records;
    result = CoCreateInstance(CLSID_CADORecordset, NULL,
     CLSCTX_INPROC_SERVER, IID_IADORecordset,(LPVOID*)&records);

        return 0;

result = records->Open(CComVariant((CComBSTR)"SELECT MEMBNO FROM
                   CComVariant(piTmpConnection), adOpenKeyset,
                   adLockOptimistic, adCmdText);
      return 0;

The everything is fine.
If i pass it remotely its fails when attempting to open the recordset.
If i change this line to

result = piTmpConnection->Execute((CComBSTR)"SELECT MEMBNO FROM
BASIC", NULL,adCmdUnspecified,&records);

Same thing.

I think this is enough to prove it does not work. Im not an expert on
COM, can anybody improve on what i have done?

Thanks for your help.

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