Hello Dragon,
I usually put this functionality in the refresh event of the control (actually I call a method from the event).

THIS.CAPTION = 'YOUR CAPTION HERE'

Bob

>Can't get this to work... and can't find it in help either, and almost two years have passed since I last did this. UT search doesn't allow equal sign in the search string, and there don't seem to be too many label-related messages in this category anyway. So - question:
>
>I want to use a =expression as a caption of a label. But it doesn't refresh - whatever value the expression had when the label was instantiated, that value remains. I also tried =(expression), same result.
>
>Was there some trick to this?