How to connect via windows authentication?

Velichko Yuriy <[email protected]>
Newsgroups gmane.comp.db.tds.freetds
Message-ID <CAN=WvWun1+NR=bVVm2wNsNJi7K=TCkwK1VE3nt-THWuOdOmU2g@mail.gmail.com> 
Hello!

I can't figure out how to connect to SQL Server via windows auth using
fretds library (dblib).

In examples is shown how to connect via the SQL authentication.

Is there example for windows auth.
Should I change conf file, or set specific info to the LOGINREC for
dbopen() ?
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