hi, all
   in Hans Hagen's "Metafun context
mkiv<http://www.pragma-ade.com/general/manuals/metafun-s.pdf>"
page 208, there is some buttons example, I want to know how to implement a
complete buttons in context, Thanks in advance!

  another, in Presentations (screen documents) <http://Presentations
(screen documents)>, there is three examples, but they are not able to be
compiled by the latest context version 2012.12.28 20:30, I hope to get some
advanced examples

  Thanks!

BEST REGARDS
PengCZ