toolbar->AddSeparator();
toolbar->AddTool(ID_UNDO, _T("Undo"),bmp_undo, wxNullBitmap, wxITEM_NORMAL, _T("Undo"), _T("Undo"));
toolbar->AddTool(ID_REDO, _T("Redo"),bmp_redo, wxNullBitmap, wxITEM_NORMAL, _T("Redo"), _T("Redo"));
toolbar->AddSeparator();
toolbar->AddTool(ID_UNDO, _T("Undo"),bmp_undo, wxNullBitmap, wxITEM_NORMAL, _T("Undo"), _T("Undo"));
toolbar->AddTool(ID_REDO, _T("Redo"),bmp_redo, wxNullBitmap, wxITEM_NORMAL, _T("Redo"), _T("Redo"));