Hi Francisko,

>When a user select another combobox option from the list, i will validate if that change can be made. if not i display a message and will show the original value that has the combobox when the user selected.

There are a couple ways to do this. But I won't recommend them. What I do recommend is if access to the ComboItem will be denied, don't even show it on the list in the first place. However, depending on your situation, this may be different.