Since I hadn't heard back from anyone, I did some more research and playing around and got the right combination and here are results:
For DSN-Less connection string that can be used with Informix Client-SDK 2.5 ODBC driver to connect using Perl (5.005_3) on Win32, DBI, DBD::ODBC (0.28) 1. Once the Informix Client-SDK has been installed, there is a Informix Client-SDK utility called SetNet32 that has be run to set up the proper Informix vars, such as host, server, service, etc. for a given server/database and then that server has to be designated as the default server. 2. Also make sure in your winXX/system32/drivers/etc/Services file, the proper Informix service and port no./service are set up. If the above is done then the following should work in order to connect to Informix using DBI and ODBC without a DSN ( my $dsn ='driver={INFORMIX 3.32 32 BIT};host=host_name;srvr=server_name;serv=service_name;pro=olsoctsp;database =database_name;uid=id;pwd=password;'; # # protocol name above is olsoctcp, other protocols will work as long as supported by network # $dbh = DBI->connect("dbi:ODBC:$dsn", { RaiseError => 1, AutoCommit => 1}); DSN...Leave home without it! Alex Mitsuda @ NEUBERGER BERMAN * [EMAIL PROTECTED] * 646-497-4181 @ SECOND FOUNDATION TECH., INC. * [EMAIL PROTECTED] * 718-686-2870 This message contains confidential information and is intended only for the individual named. If you are not the named addressee you should not disseminate, distribute or copy this e-mail. Please notify the sender immediately by e-mail if you have received this e-mail by mistake and delete this e-mail from your system. E-mail transmission cannot be guaranteed to be secure or error-free. The sender therefore does not accept liability for any errors or omissions in the contents of this message that arise as a result of e-mail transmission. This message is provided for informational purposes and should not be construed as a solicitation or offer to buy or sell any securities or related financial instruments. All e-mails at Neuberger Berman are, in accordance with Firm policy, to be used for Neuberger Berman business purposes only. E-mails sent from or to the Firm are subject to being reviewed by the Firm in accordance with the Firm's procedure for the review of correspondence.