Aldo,
 
I tried to compile your module, but I received this error message:
 
        cl -c    -nologo -Gf -W3 -MD -Zi -DNDEBUG -O1 -DWIN32 -D_CONSOLE -DNO_ST
RICT -DHAVE_DES_FCRYPT -DPERL_IMPLICIT_CONTEXT -DPERL_IMPLICIT_SYS -DUSE_PERLIO
-DPERL_MSVCRT_READFIX -MD -Zi -DNDEBUG -O1    -DVERSION=\"0.41\"  -DXS_VERSION=\
"0.41\"  "-IC:\Perl\lib\CORE"   Callback.c
'cl' is not recognized as an internal or external command,
operable program or batch file.
NMAKE : fatal error U1077: 'C:\WINDOWS\system32\cmd.exe' : return code '0x1'
Stop.
NMAKE : fatal error U1077: 'C:\WINDOWS\system32\cmd.exe' : return code '0x2'
Stop.
 
I use win XP and nmake for compile.
Can you help me? What do I wrong?
Thanks
 
Gabor