connecting to informix

[Database Administrator]

I am trying to connect to Informix using an existing application with
a field for a connection string. Using the ODBC driver works great,
however I would like to use the .NET driver for performance reasons.
Is there a way to specify the string use that driver instead of the
current example:

Driver={IBM INFORMIX ODBC
DRIVER};Server=svr_custom;Database=test;Uid=userna me;Pwd=password

I would like to make it use the .NET driver instead. Any suggestions?

This is an application that listens to messages from a socket message
handler and then processes them for use in the database.