It seems to me that a dropdown combobox would be a better choice for picking a cus.

>I have two lists and a grid.
>list1 is a cus list
>list2 is a prod list
>grid1 is a container for prods chosen
>
>Once user chooses a cus they go to prod list.
>When leaving cus list it is disabled.
>While choosing prods a user can't look up to cus list and see a cus.
>All cus look alike--so I want to change the color of selected cus.
>But the list must be disabled.
>
>How do I do that.