winldapapi + kerberos

Hi,
How to force ldap_bind_s to user kerberos ? With LDAP_AUTH_NEGOTIATE as a 4th option I am able to use NTLM, but how can I say to ldap_bind_s to use Kerberos and not NTLM ?
thanks in advance...
[210 byte] By [slivkap] at [2007-11-19 16:25:13]