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class PanelCtrl : public Ctrl { void Enable(bool b) { Ctrl * ctrl = GetFirstChild(); while(ctrl) { ctrl->Enable(b); ctrl = ctrl->GetNext(); } } }; PanelCtrl panel; panel.Add(droplist0); panel.Add(droplist1); panel.Enable(false);
WithPanelLayout<PanelCtrl> panel; ... CtrlLayout(panel);