NSKeyUpMask A mask for key-up events. Declarationstatic const NSEventMask NSKeyUpMask; See AlsoDeprecated TypesNSLeftMouseDownMaskNSLeftMouseUpMaskNSRightMouseDownMaskNSRightMouseUpMaskNSOtherMouseDownMaskNSOtherMouseUpMaskNSMouseMovedMaskNSLeftMouseDraggedMaskNSRightMouseDraggedMaskNSOtherMouseDraggedMaskNSMouseEnteredMaskNSMouseExitedMaskNSCursorUpdateMaskNSKeyDownMaskNSFlagsChangedMask