Hi,
Thank you.
I have try your code, and I found that is not what I want.
I am looking for control that able to show data like treeview but multiple columns. For example: POS system screen to show list of items, user able to drop down the item to view it's ingredient.

  Item Code  ItemName            Price  Qty  Amount
- ItemA      Computer Set A      1500    1   1500
  Monitor    Monitor              100    1    100
  SCard      SB Live!              50    1     50
  RAM        128 MB RAM            50    3    150

and bla bla bla....

If user don't wan to view in details, it should show like

  Item Code  ItemName            Price  Qty  Amount
+ ItemA      Computer Set A      1500    1   1500

Any recommendation?

Thank you