Implement AccessibilityPrevious, AccessibilityNext, and AccessibilityAccept(the enumerators to access widgets embedded in the completion-list by keyboard). The general rule now is: When you press shift while navigating in the completion-widget, you navigate within the embedded widgets. shift+return triggers AccesibilityAccept, shift+up/shift+left triggers AccessibilityPrevious, and shift+right/shift+down triggers AccessibilityNext