I am running into an issue with the GetSpellingSuggestions method.  If I call
it without specifying a custom dictionary, the call works find and returns a
list of words as expected.  However, if I provide the path to a custom
dictionary it fails with an HR of 0x800a239d (which I can find no reference
to anywhere).

Here is the code that displays the error...  If I make the 'dictionary'
variant vtMissing, the GetSpellingSuggestions works perfectly.  Anybody have
any suggestions (pun intented)...

STDMETHODIMP CSpellChecker::GetSpellingSuggestions
(
  BSTR word,
  BSTR customDictionary,
  ISpellingSuggestions **suggestions
){
  HRESULT               returnValue;
  MSWord::_ApplicationPtr   spellChecker = _Module.getMSWordApplication();

  if( NULL == spellChecker )
  {
     returnValue = E_UNEXPECTED;
  }
  else if( NULL == word ||
         NULL == suggestions )
  {
     returnValue = E_POINTER;
  }
  else
  {
     try
     {
        _variant_t   ignoreUppercase( m_ignoreUppercase );
        _variant_t   dictionary = validateCustomDictionary(
customDictionary ) ? _variant_t(customDictionary) : vtMissing;

        MSWord::SpellingSuggestionsPtr sug =
spellChecker->GetSpellingSuggestions( word, &dictionary, &ignoreUppercase );

        CSpellingSuggestions * cSug = new CComObject<CSpellingSuggestions>;

        cSug->SetSuggestions( sug );

        *suggestions = cSug;
        (*suggestions)->AddRef();

        returnValue = S_OK;
     }
     catch( const _com_error & e )
     {
        _bstr_t   message( e.ErrorMessage() );
        _bstr_t desc( e.Description() );
        OutputDebugString( e.ErrorMessage() );
        OutputDebugString( "\n" );

        returnValue = E_FAIL;
     }
  }

  return( returnValue );
}