[Overview][Constants][Types][Classes][Procedures and functions][Index] | Reference for unit 'ComCtrls' (#lcl)

# TCustomTreeView.OnExpanded

OnExpanded - specialised event handler when a TreeView has been expanded

## Declaration

Source position: comctrls.pp line 2408

`protected property TCustomTreeView.OnExpanded: TTVExpandedEvent read FOnExpanded write FOnExpanded;`

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