John,

Make the first column a single character that'll hold the +/- indicator. If they click - simply delete the relevant child rows and change it to a +. When they click the + recall the relevant child rows and change it to a -. Then all you have todo is call the grid.Refresh()

>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
>
>