reloading foreign libraries

[<par...@so...>]

Hi, 

I'd like to be able to edit a foreign file and reload it into my lisp image 
without having to restart lisp.  I am running clisp 2.47 with cffi 10.6 
under XP (not my choice).  I can close-foreign-function with a T result.  
However, the dll seems to still be locked from being overwritten by the 
compiler.  In addition, when I try to load a slightly modified dll with a 
different filename, the load-foreign-library fails with: 

Unable to load foreign library (LIBRARY-15386).
FFI:OPEN-FOREIGN-LIBRARY: Cannot open library "c:/v/site/jpars/Project3"
[Condition of type LOAD-FOREIGN-LIBRARY-ERROR] 

David Herring told me to ask the CLISP list.  Anybody here know how to 
reload a C library on XP without having to quit the lisp interpreter? 

Thanks,
Bob