请问如何给ListBox的每个Item前加上个图标？谢了

Question

you see this code
procedure TFmMain.ListBoxGroupUserDrawItem(Control: TWinControl;
  Index: Integer; Rect: TRect; State: TOwnerDrawState);
begin
  ListBoxGroupUser.Canvas.FillRect(rect);
  ImageListView.draw(ListBoxGroupUser.Canvas,rect.Left+2,Rect.top+2,0);
  ListBoxGroupUser.Canvas.TextOut(Rect.Left+ImageListView.Width+2*2,Rect.Top+3,ListBoxGroupUser.Items.Strings[index]);
end;

Answer 1

to: gz_wh 
可以说一下那段代码是点 listbox的哪个事件呢？

Answer 2

to adminb0
 请教那段代码中： fillrec(rect)是代表什么？ imagelistview在那里定义了呢？