Cook Computing

If you use the Microsoft LDAP API (wldap32.dll) and you want support for non-ASCII characters even when using the wide char versions of the functions, you must configure version 3 of LDAP:

ULONG LdapVersionOpt=LDAP_VERSION3; 
ULONG ret=ldap_set_option(hLDAP, LDAP_OPT_VERSION,
    (void*) &LdapVersionOpt);

Easy to forget, as I found out recently.