Listview-Einträge vertauscht nach Drag&Drop

[Bummi]

folgendes funktioniert bei mir ....

Delphi-Quellcode:

unit Unit3;

interface

uses
  Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
  Dialogs, ComCtrls;

type
  TForm3 = class(TForm)
    ListView1: TListView;
    procedure ListView1MouseDown(Sender: TObject; Button: TMouseButton; Shift: TShiftState; X, Y: Integer);
    procedure ListView1DragDrop(Sender, Source: TObject; X, Y: Integer);
    procedure ListView1DragOver(Sender, Source: TObject; X, Y: Integer; State: TDragState; var Accept: Boolean);
    procedure FormCreate(Sender: TObject);
  private
    { Private-Deklarationen }
  public
    { Public-Deklarationen }
  end;

var
  Form3: TForm3;

implementation

{$R *.dfm}

procedure TForm3.FormCreate(Sender: TObject);
begin
  ReportMemoryLeaksOnShutDown := true;
end;

procedure TForm3.ListView1DragDrop(Sender, Source: TObject; X, Y: Integer);
var
 li:TListItem;
begin
    li:= TListItem.Create(ListView1.Items);
    li.Assign(ListView1.DropTarget);
    ListView1.DropTarget.Assign((ListView1.Items[ListView1.Itemindex]));
    ListView1.Items[ListView1.Itemindex].Assign(li);
    li.Free;
end;

procedure TForm3.ListView1DragOver(Sender, Source: TObject; X, Y: Integer; State: TDragState; var Accept: Boolean);
begin
  Accept := Source=Sender;

end;

procedure TForm3.ListView1MouseDown(Sender: TObject; Button: TMouseButton; Shift: TShiftState; X, Y: Integer);
begin
  if Button=mbLeft then  ListView1.BeginDrag(false);
end;

end.