How to pull only new data from zkemkeeper by registering the real time events?

See more:

fingerprint

C#7.0

I need when any record attendance done on machine zk can get that record directly ?
i search more on internet i found one way is called register real time event as below
How to use sta_RegRealTime to pull data automatically

my link
https://stackoverflow.com/questions/44258751/pull-only-the-new-data-from-biometric-device-zkemkeeper

What I have tried:

public int sta_RegRealTime(ListBox lblOutputInfo)
        {
            if (GetConnectState() == false)
            {
                lblOutputInfo.Items.Add("*Please connect first!");
                return -1024;
            }

            int ret = 0;

            if (axCZKEM1.RegEvent(GetMachineNumber(), 65535))//Here you can register the realtime events that you want to be triggered(the parameters 65535 means registering all)
            {
                //common interface
                this.axCZKEM1.OnFinger += new zkemkeeper._IZKEMEvents_OnFingerEventHandler(axCZKEM1_OnFinger);
                this.axCZKEM1.OnVerify += new zkemkeeper._IZKEMEvents_OnVerifyEventHandler(axCZKEM1_OnVerify);
                this.axCZKEM1.OnFingerFeature += new zkemkeeper._IZKEMEvents_OnFingerFeatureEventHandler(axCZKEM1_OnFingerFeature);
                this.axCZKEM1.OnDeleteTemplate += new zkemkeeper._IZKEMEvents_OnDeleteTemplateEventHandler(axCZKEM1_OnDeleteTemplate);
                this.axCZKEM1.OnNewUser += new zkemkeeper._IZKEMEvents_OnNewUserEventHandler(axCZKEM1_OnNewUser);
                this.axCZKEM1.OnHIDNum += new zkemkeeper._IZKEMEvents_OnHIDNumEventHandler(axCZKEM1_OnHIDNum);
                this.axCZKEM1.OnAlarm += new zkemkeeper._IZKEMEvents_OnAlarmEventHandler(axCZKEM1_OnAlarm);
                this.axCZKEM1.OnDoor += new zkemkeeper._IZKEMEvents_OnDoorEventHandler(axCZKEM1_OnDoor);

                //only for color device
                this.axCZKEM1.OnAttTransactionEx += new zkemkeeper._IZKEMEvents_OnAttTransactionExEventHandler(axCZKEM1_OnAttTransactionEx);
                this.axCZKEM1.OnEnrollFingerEx += new zkemkeeper._IZKEMEvents_OnEnrollFingerExEventHandler(axCZKEM1_OnEnrollFingerEx);

                //only for black&white device
                this.axCZKEM1.OnAttTransaction -= new zkemkeeper._IZKEMEvents_OnAttTransactionEventHandler(axCZKEM1_OnAttTransaction);
                this.axCZKEM1.OnWriteCard += new zkemkeeper._IZKEMEvents_OnWriteCardEventHandler(axCZKEM1_OnWriteCard);
                this.axCZKEM1.OnEmptyCard += new zkemkeeper._IZKEMEvents_OnEmptyCardEventHandler(axCZKEM1_OnEmptyCard);
                this.axCZKEM1.OnKeyPress += new zkemkeeper._IZKEMEvents_OnKeyPressEventHandler(axCZKEM1_OnKeyPress);
                this.axCZKEM1.OnEnrollFinger += new zkemkeeper._IZKEMEvents_OnEnrollFingerEventHandler(axCZKEM1_OnEnrollFinger);


                ret = 1;
            }
            else
            {
                axCZKEM1.GetLastError(ref idwErrorCode);
                ret = idwErrorCode;

                if (idwErrorCode != 0)
                {
                    lblOutputInfo.Items.Add("*RegEvent failed,ErrorCode: " + idwErrorCode.ToString());
                }
                else
                {
                    lblOutputInfo.Items.Add("*No data from terminal returns!");
                }
            }
            return ret;
        }
and their definitions:

 //If your fingerprint(or your card) passes the verification,this event will be triggered,only for color device
        void axCZKEM1_OnAttTransactionEx(string EnrollNumber, int IsInValid, int AttState, int VerifyMethod, int Year, int Month, int Day, int Hour, int Minute, int Second, int WorkCode)
        {
            string time = Year + "-" + Month + "-" + Day + " " + Hour + ":" + Minute + ":" + Second;

            gRealEventListBox.Items.Add("Verify OK.UserID=" + EnrollNumber + " isInvalid=" + IsInValid.ToString() + " state=" + AttState.ToString() + " verifystyle=" + VerifyMethod.ToString() + " time=" + time);

            throw new NotImplementedException();
        }

        //If your fingerprint(or your card) passes the verification,this event will be triggered,only for black%white device
        private void axCZKEM1_OnAttTransaction(int EnrollNumber, int IsInValid, int AttState, int VerifyMethod, int Year, int Month, int Day, int Hour, int Minute, int Second)
        {
            string time = Year + "-" + Month + "-" + Day + " " + Hour + ":" + Minute + ":" + Second;
            gRealEventListBox.Items.Add("Verify OK.UserID=" + EnrollNumber.ToString() + " isInvalid=" + IsInValid.ToString() + " state=" + AttState.ToString() + " verifystyle=" + VerifyMethod.ToString() + " time=" + time);

            throw new NotImplementedException();
        }

        //After you have placed your finger on the sensor(or swipe your card to the device),this event will be triggered.
        //If you passes the verification,the returned value userid will be the user enrollnumber,or else the value will be -1;
        void axCZKEM1_OnVerify(int UserID)
        {
            if (UserID != -1)
            {
                gRealEventListBox.Items.Add("User fingerprint verified... UserID=" + UserID.ToString());
            }
            else
            {
                gRealEventListBox.Items.Add("Failed to verify... ");
            }

            throw new NotImplementedException();
        }