LDAP + PHP + C++(Qt)

http://pdf.sp-atelier.ru/ldap/

http://api.kde.org/4.5-api/kdepimlibs-apidocs/kldap/html/annotated.html

kldap

http://www.userbooster.de/en/download/openldap-for-windows.aspx

https://laas.mine.nu/uclibc/openldap-2.1.30/libraries/libldap_r/