I have a form with among other items a list box and a set of navigation buttons for items in the list. If I use the navigation buttons to move in the list box they get refreshed, i.e when on (assume 3 lines) line

1 - only down bottom buttons are highlighted
2 - all buttons are highlighted
3 - only up and top button are highlighted.

This is controled by code in the refresh method of the class by setting some flags, i.e. topfile, endfile. Can I do this from the interactive change method of the listbox (where form refresh is called) and if so how.

TIA