Как выводить hint при движении мыши над списком

Code:

...

public

HintRow: Integer;

HintString: String;

procedure OnShowHint(var HintStr: string;

   var CanShow: Boolean; var HintInfo: THintInfo);

...

procedure TForm1.FormCreate(Sender: TObject);

begin

Application.HintPause := 100;

Application.HintHidePause := 30000;

ListBox1.Items.Add('It is a long row');

ListBox1.Items.Add('It is a very long row');

ListBox1.Items.Add('And it is a very very long row');

ListBox1.Items.Add('But this row if longer then other rows');

ListBox1.Items.Add('It was not truth, because this row is so long, that I do not know, what' + #13#10 +

   'will do the program with this row. Do You know it? I think that it will be' + #13#10 +

   'very interesting to look at this row. But if it will be longer and longer,' + #13#10 +

   'what will be? Look!!!');

ListBox1.Items.Add('Short row');

ListBox1.Items.Add('123');

HintRow := -1;

Application.OnShowHint := OnShowHint;

ListBox1.ShowHint := true;

end;

procedure TForm1.ListBox1MouseMove(Sender: TObject; Shift: TShiftState; X, Y: Integer);

var

ItemNum: Integer;

begin

ItemNum := ListBox1.ItemAtPos(Point(X, Y), True);

if (ItemNum <> HintRow) then begin

   HintRow := ItemNum;

   Application.CancelHint;

   if HintRow > -1 then begin

     HintString := ListBox1.Items[ItemNum];

     if (ListBox1.Canvas.TextWidth(HintString) <= ListBox1.ClientWidth)

       then HintString := '';

   end else HintString := '';

end;

end;

procedure TForm1.OnShowHint(var HintStr: string;

var CanShow: Boolean; var HintInfo: THintInfo);

begin

if not (HintInfo.HintControl is TListBox) then Exit;

with HintInfo.HintControl as TListBox do begin

   HintInfo.HintPos := ListBox1.ClientToScreen(Point(-1,

     ListBox1.ItemRect(HintRow).Top - 3));

   HintStr := HintString;

end;

end;