what is equivalent to _bstr_t?

[steg90]

Hi,

I have a COM DLL I wrote in C# which I call from one of my MFC applications as follows:

BOOL CDADcb::OpenDatabase( CString strFilename )
{
   BSTR bstrName = strFilename.AllocSysString();
   m_bLoaded = m_spDCBParse->OpenDatabase( bstrName );
   return m_bLoaded;
}

BOOL CDADcb::OpenDatabase( CString strFilename )
{
   BSTR bstrName = strFilename.AllocSysString();
   m_bLoaded = m_spDCBParse->OpenDatabase( bstrName );
   return m_bLoaded;
}

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My problem is, what data type do I use as the BSTR using Qt4?

Kind regards,
Steve