RAD Studio VCL Reference
TAction is the generic class for action objects that implement user commands across a range of different controls. 
TActionLink is the base class for action links that connect actions to commonly used properties of VCL objects, components and controls. 
TActionList maintains a list of actions that can be used by components and controls, such as menu items and buttons. 
This is class ActnList.TActionListEnumerator. 
TContainedAction is the base class for actions that can be grouped by category and that can appear in action lists or action managers. 
TCustomAction is the base class for actions meant to be used with menu items and controls. 
TCustomActionList is the base class for action list objects that manage a set of actions. 
TShortCutList manages an array of keyboard shortcuts. 
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