IF YOU CAN SEE THIS go to http://www.cs.cornell.edu/Info/People/sfa/Nuprl/Shared/Xindentation_hack_doc.html
The section "mb_event_system_3" of Mark Bickford's Event Systems library.
(creation_script.lisp)
Tue Nov 4 16:32:50 EST 2003
IF YOU CAN SEE THIS go to http://www.cs.cornell.edu/Info/People/sfa/Nuprl/Shared/Xindentation_hack_doc.html