TListColumns

type TListColumns = class(TCollection)

protected

  function GetOwner; override;

public

  constructor Create();

Create - constructor for TListColumns: sets ownership then calls inherited Create

  destructor Destroy; override;

Destroy - destructor for TListColumns: calls inherited destructor

  procedure Update(); override;

Update checks if update is in fact required, then calls inherited method

  function Add;

Add calls inherited method, then adjusts state flags

  property Owner: TCustomListView; [r]

  property Items: TListColumn; default; [rw]

  procedure Assign(); override;

Assign checks that source is of correct type, then adds new columns and copies items from source into them; otherwise calls inherited Assign which probably raises an exception

end;

TListColumns

TListColumns - a collection of Items of type TListColumn (the columns appearing in a multi-column list)

TCollection

TPersistent

TObject