Never mind. I feel stupid.

I was assuming (you know what that means) that the ColumnOrder property value did not change dynamically. It does. That allows me to search through the columns collection to find the column object with the matching ColumnOrder.

FOR EACH colItem IN This.Columns
    IF colItem.ColumnOrder = This.ActiveColumn THEN
        chrCurrentFieldCaption = colItem.Header1.Caption
    ENDIF
ENDFOR

John