This inheritance list is sorted roughly, but not completely, alphabetically:

[detail level 1234]

▼CAActor
CAHorizonSpline
CAHorizonTweenSystem
CFHorizonTweenEventCustomColorCurve
CFHorizonTweenEventCustomCurve
▼CFHorizonTweenEventImplementParameters
▼CFHorizonTweenEventSplinePathParameters
CFHorizonTweenEventActorMoveSplinePathParameters
CFHorizonTweenEventSceneComponentMoveSplinePathParameters
CFHorizonTweenEventSlateWidgetMoveSplinePathParameters
CFHorizonTweenEventWidgetMoveSplinePathParameters
▼CFHorizonTweenEventTweenListImplementParameters
▼CFHorizonTweenEventFloatParameters
CFHorizonTweenEventSlateWidgetRotatorFromToParameters
CFHorizonTweenEventWidgetRotatorFromToParameters
▼CFHorizonTweenEventLinearColorParameters
CFHorizonTweenEventActorColorFromToParameters
CFHorizonTweenEventSceneComponentColorFromToParameters
CFHorizonTweenEventSlateWidgetColorFromToParameters
CFHorizonTweenEventWidgetColorFromToParameters
▼CFHorizonTweenEventRotatorParameters
CFHorizonTweenEventActorRotatorFromToParameters
CFHorizonTweenEventSceneComponentRotatorFromToParameters
▼CFHorizonTweenEventVectorParameters
CFHorizonTweenEventActorMoveFromToParameters
CFHorizonTweenEventActorScaleFromToParameters
CFHorizonTweenEventSceneComponentMoveFromToParameters
CFHorizonTweenEventSceneComponentScaleFromToParameters
▼CFHorizonTweenEventWidgetVector2DParameters
CFHorizonTweenEventSlateWidgetMoveFromToParameters
CFHorizonTweenEventSlateWidgetScaleFromToParameters
CFHorizonTweenEventSlateWidgetSheerFromToParameters
CFHorizonTweenEventWidgetMoveFromToParameters
CFHorizonTweenEventWidgetScaleFromToParameters
CFHorizonTweenEventWidgetSheerFromToParameters
CFHorizonTweenEventParameters
CFHorizonTweenEventTransformParam
▼CIModuleInterface
▼CIHorizonTweenModule
CFHorizonTweenModule
▼CModuleRules
CHorizonTween
▼CUBlueprintAsyncActionBase
▼CUHorizonTweenEvent
▼CUHorizonTweenActorEvent
CUHorizonTweenActorColorFromToEvent
CUHorizonTweenActorMoveFromToEvent
CUHorizonTweenActorMoveSplinePathEvent
CUHorizonTweenActorRotatorFromToEvent
CUHorizonTweenActorScaleFromToEvent
CUHorizonTweenSplinePathEvent
▼CUHorizonTweenBaseTypeEvent
CUHorizonTweenFloatEvent
CUHorizonTweenLinearColorEvent
CUHorizonTweenRotatorEvent
CUHorizonTweenVector2DEvent
CUHorizonTweenVectorEvent
▼CUHorizonTweenSceneComponentEvent
CUHorizonTweenSceneComponentColorFromToEvent
CUHorizonTweenSceneComponentMoveFromToEvent
CUHorizonTweenSceneComponentMoveSplinePathEvent
CUHorizonTweenSceneComponentRotatorFromToEvent
CUHorizonTweenSceneComponentScaleFromToEvent
▼CUHorizonTweenWidgetEvent
CUHorizonTweenWidgetColorFromToEvent
CUHorizonTweenWidgetMoveFromToEvent
CUHorizonTweenWidgetMoveSplinePathEvent
CUHorizonTweenWidgetRotatorFromToEvent
CUHorizonTweenWidgetScaleFromToEvent
CUHorizonTweenWidgetSheerFromToEvent
CUHorizonTweenSystemProxy
▼CUBlueprintFunctionLibrary
CUHorizonTweenFunctionLibrary
CUHorizonTweenSystemLibrary