How to change the position of item in the coulmn of listbox

[Nader]

I use this code to add item into listbox and remove item into listbox
ListBox2.AddItem TextBox1.Text
ListBox2.ListIndex = ListBox2.ListCount - 1

ListBox2.RemoveItem ListBox2.ListIndex
ListBox2.ListIndex = ListBox2.ListCount - 1

I want to move the item I inserted in the list to below or to above. it's mean change the position of them in the list by using two command button.