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Handling Exceptions - Visual C++ using Smart Pointers

void CVcSampleDlg::OnScannerDiagnose()

{

try

 {

  (*m_pScanMan)->Diagnose(dlg.m_mode, L_PORT_USE_CURRENT);

 }

catch(_com_error & ex)

 {

    //An error has occurred. Put up a message box and exit.

   CString Msg = _T("Error OnScannerDiagnose : Source: ") ;

  _bstr_t bstrSource(ex.Source());

   _bstr_t bstrDesc(ex.Description());

   CString s = (char *)bstrSource;

   Msg = Msg + s;

   s = (char *)bstrDesc;

   Msg = Msg + " Description: " + s;

   AfxMessageBox(Msg);

  }

}

 

Information Provided by Exception Object

Property to use

Description of the Error Condition

ex.Description()

HRESULT returned by the method

ex.Error()

Source of the error

ex.Source()

 

 

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