1def event_cb(e): 2 mbox = e.get_current_target() 3 print("Button %s clicked" % mbox.get_active_btn_text()) 4 5btns = ["Apply", "Close", ""] 6 7mbox1 = lv.msgbox(lv.scr_act(), "Hello", "This is a message box with two buttons.", btns, True) 8mbox1.add_event_cb(event_cb, lv.EVENT.VALUE_CHANGED, None) 9mbox1.center() 10 11