[plt-scheme] structure inspectors

I would like to examine a built-in structure, specifically the-style-list 
in the MrEd editor toolkit.  This means dealing with inspectors.  I saw in 
the list archive that you could use a procedure called make-->vector to 
bypass inspectors, but I cannot get this to work, because I am unable to 
come up with a struct type descriptor.  It should be struct:style-list%, 
but this ends up being an unbound value in the environment.
	Any suggestions?  I would like to be able to look at style lists 
in a single glance, without having to access each field individually.


Thanks,

Nick Chubrich.