How do i change the item in the drop down list, and furthermore update the constant

hello guys,

I have a drop down list Control that is full of items. I would like to change the lables on these items at runtime, as i knew, i should use the Ring but not Enum, because we can't change values of enum at runtime.

Furthermore i want to creat a Constant from this Control (drop down list ) on the block diagram, but if i edit the item list of the Ring control, LabVIEW does not automatically update the constant to which it is linked.

how can I solve it?

Thx and Best regards

Di