void sipXTabbedDlg::OnChanging( wxNotebookEvent &event )
{
    int page = event.GetSelection();

    if (mpPage[page]->validateData() == false)
    {
        event.Veto();
    }
}
/*---------------------------------------------------------------------------*/
void wxCreateTableDialog::OnBookPageChanging(wxNotebookEvent& event)
{
   if (event.GetOldSelection() == 0)
   {
      wxString ddl = GetCreateTableDDL();

      if (ddl.IsEmpty())
         event.Veto();
      else
         m_TextDdl->SetValue(ddl);
   }
}