Greg, I'm not aware of a readseq dll for windows.
I don't build dll's so don't know what is involved, but if
it is a matter of compiling c code with thr right switches,
it may be easy to do with verison 1 of readseq. If MSoft
would want to do something useful to support java on its os, you
might use readseq version 2 java jar in place of a dynamic link library.
-- gilbertd at bio.indiana.edu