You need to open a VI Reference to the VI that contains the Enum, then get a Panel reference, then read the Panel.Controls[] property which is an array of Control References. Then, search through them in a loop, until you find the Enum control, based on its Label.Text property (which corresponds to its Control Name). You now have a reference to the Enum and can set its Strings[] property. In order to do this, you will need an understanding of Refnum type casting and LabVIEW's class hierarchy. When I have a moment, I will create you an example, unless someone beats me to it
😉-Jim