Represents the event handler for events that notify a tree view of changes to one of its nodes.
TTVExpandedEvent = procedure (Sender: TObject; Node: TTreeNode) of object;
(Sender: TObject; Node: TTreeNode) ( TTVExpandedEvent)();
ComCtrls
TTVExpandedEvent is used to respond to notifications of events that occur to the nodes of a tree view control. It is a generic event handler for various events that notify the tree view of something that happened to a node.
Sender is the tree-view control that contains the node that is the focus of the notification.
Node is the item that has been expanded, collapsed, deleted, or which is about to be drawn.
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