_hours = new wxTextCtrl (_editable, wxID_ANY, wxT(""), wxDefaultPosition, s, 0, validator);
_hours->SetMaxLength (2);
editable_sizer->Add (_hours);
_hours = new wxTextCtrl (_editable, wxID_ANY, wxT(""), wxDefaultPosition, s, 0, validator);
_hours->SetMaxLength (2);
editable_sizer->Add (_hours);