Win32::ODBC tanked early for me. When I sent email to Dave Roth, I got this back:

"To be honest we have not dealt with Win32::ODBC for several years now.
Most users are migrating to use DBI and the DBD::ODBC modules instead.
Since our perl projects are unfunded we have very little time to devote to them.
If you want to explore this further the source code for Win32::ODBC is on our FTP site. "

I've been using DBI ever since.