Problems compiling eSNACC v1.7.4

Hello

I am running Microsoft Visual C++ v6.  I loaded "./SNACC/snacc_builds.dsw"
and attempted to build.  Everything works fine until I get error below:

--------------------Configuration: compiler - Win32
Debug--------------------
Performing Custom Build Step on ".\core\parse-asn1.y"
'bison' is not recognized as an internal or external command,
operable program or batch file.
Error executing c:\windows\system32\cmd.exe.

So I thought maybe I need to install bison.  I downloaded and installed
Bison for Windows and added bison to path.  I can run bison from the command
line ok but still get the above message.

I even downloaded and installed flex - but made no difference.

I tried to find the line which calls bison but can't seem to find it.

Can anyone help?

Angus