[C#]
    event TSBDNSKeyNeededEvent OnDNSKeyNeeded;
    delegate void TSBDNSKeyNeededEvent(Object Sender, string Owner, ushort KeyTag, byte Algorithm, ref TElDNSPublicKeyRecord Key, ref bool ReleaseKey);

[VB.NET]
    Event OnDNSKeyNeeded As TSBDNSKeyNeededEvent
    Delegate Sub TSBDNSKeyNeededEvent(ByVal Sender As Object, ByVal Owner As String, ByVal KeyTag As UInt16, ByVal Algorithm As Byte, ByRef Key As TElDNSPublicKeyRecord, ByRef ReleaseKey As Boolean)

[Pascal]
    under development

[C++]
    void get_OnDNSKeyNeeded(TSBDNSKeyNeededEvent &pMethodOutResult, void * &pDataOutResult);
    void set_OnDNSKeyNeeded(TSBDNSKeyNeededEvent pMethodValue, void * pDataValue);
    typedef void (SB_CALLBACK *TSBDNSKeyNeededEvent)(void * _ObjectData, TObjectHandle Sender, const char * pcOwner, int32_t szOwner, uint16_t KeyTag, uint8_t Algorithm, TElDNSPublicKeyRecordHandle &Key, int8_t &ReleaseKey);

[PHP]
    TSBDNSKeyNeededEvent|callable|NULL get_OnDNSKeyNeeded()
    void set_OnDNSKeyNeeded(TSBDNSKeyNeededEvent|callable|NULL $Value)
    callable TSBDNSKeyNeededEvent(TObject $Sender, string $Owner, integer $KeyTag, integer $Algorithm, TElDNSPublicKeyRecord &$Key, bool &$ReleaseKey)

[Java]
    TSBDNSKeyNeededEvent getOnDNSKeyNeeded();
    void setOnDNSKeyNeeded(TSBDNSKeyNeededEvent Value);
    TSBDNSKeyNeededEvent.Callback OnDNSKeyNeeded = new TSBDNSKeyNeededEvent.Callback() {
        public void TSBDNSKeyNeededEventCallback(TObject Sender, String Owner, short KeyTag, byte Algorithm, TElDNSPublicKeyRecord[] Key, TSBBoolean ReleaseKey) {
            //...
        }
    }