Using a library compiled for 8.3 in 8.2

Hello!

Today, I have finally managed to compile PostgreSQL 8.3devel using Visual
C++ 2005 on Windows XP PRO. It was a tough process as I've never hacked such
a big OS project like PGSQL. I did it becouse I needed to develop some C
functions that will be exported as functions to be called as Stored
Procedures. The dll compiled well, however, when I try to create it in the
database using the CREATE OR REPLACE FUNCTION, I get the following error
message:

ERROR: incompatible library "C:\Arquivos de
programas\PostgreSQL\8.2\lib\sgipgfunc.dll": version mismatch
SQL state: XX000
Detail: Server is version 8.2, library is version 8.3.

How could I make it work with 8.2 without having to download the 8.2 source
code and compiling it? Is there a way to do that?

Thanks in advance,

Marcelo.