If you want a field in error blink (or whatever):
 
(1) Set the error enhancement on the GLOBAL form to whatever you want.
 
(2) When you determine a field is in error, call VSETERROR
 
(3) A following VSHOWFORM will have the field blink (or however you
    ask it int he global form).
 
No bits to fiddle with.
 
(4) The next VREADFIELDS clears the error flag for the field.
 
Elbert
 
p.s. No special characters, no VCHANGEFIELD stuff, either