B4R Question Return byte array from Inline C

B4R Version: 2.51
Parsing code.    (0.00s)
Compiling code.    (0.04s)
Building project    (0.03s)
Compiling & deploying Ino project (WeMos D1 R1 - COM4)    Error
Loading configuration...
Initializing packages...
Preparing boards...
Verifying...
[JmDNS(user.local.).State.Timer] WARN javax.jmdns.impl.DNSStatefulObject$DefaultImplementation - Trying to advance state whhen not the owner. owner: null perpetrator: Prober(user.local.) state: probing 1
C:\Users\Admin\Desktop\B4R_I2~1\Objects\bin\sketch\b4r_main.cpp: In function 'void readcard(B4R::Object*)':
b4r_main.cpp:100:32: error: 'class B4R::Array' has no member named 'mfrc522'
   (Byte*)b4r_main::_cardarray->mfrc522.uid.uidByte;
                                ^
exit status 1

#Region Project Attributes
    #AutoFlushLogs: True
    #CheckArrayBounds: True
    #StackBufferSize: 5000
#End Region

Sub Process_Globals
    'These global variables will be declared once when the application starts.
    'Public variables can be accessed from all modules.
    Public Serial1 As Serial
    Private t1 As Timer
    Dim cardArray(4) As Byte
End Sub

Private Sub AppStart
    Serial1.Initialize(115200)
    t1.Initialize("t1_Tick",100)
    Log("AppStart")
    RunNative("init", Null)
    RunNative("ShowReaderDetails", Null)
    reader_value(ReaderStatus)
    t1.Enabled = True
End Sub

Sub reader_value(value As Int)
    If value = 1 Then
        Log("MFRC522 Software Version: 1.0")
    Else If value = 2 Then
        Log("MFRC522 Software Version: 2.0")
    Else If value = 3 Then
        Log("MFRC522 Software Version: Unknown")
    Else If value = 4 Then
        Log("WARNING: Communication failure, is the MFRC522 properly connected?")
    End If
End Sub

Sub t1_Tick
    RunNative("readcardid",Null)
'    Log("cardArray : " , bc.HexFromBytes(cardArray))
End Sub

#if C
#include <Wire.h>
#include "MFRC522_I2C.h"
MFRC522 mfrc522(0x28);
MFRC522::MIFARE_Key key;

void ShowReaderDetails(B4R::Object* o) {
  // Get the MFRC522 software version
  byte v = mfrc522.PCD_ReadRegister(mfrc522.VersionReg);
  //Serial.print(F("MFRC522 Software Version: 0x"));
  //Serial.print(v, HEX);
  if (v == 0x91)
    //Serial.print(F(" = v1.0"));
    b4r_main::_readerstatus = 1;
  else if (v == 0x92)
    //Serial.print(F(" = v2.0"));
    b4r_main::_readerstatus = 2;
  else
    //Serial.print(F(" (unknown)"));
    b4r_main::_readerstatus = 3;
  Serial.println("");
  // When 0x00 or 0xFF is returned, communication probably failed
  if ((v == 0x00) || (v == 0xFF)) {
    //Serial.println(F("WARNING: Communication failure, is the MFRC522 properly connected?"));
    b4r_main::_readerstatus = 4;
  }
}

void init(B4R::Object* o) {
    Wire.begin(); 
    mfrc522.PCD_Init();
    
    //MiFare Key
    key.keyByte[0] = 0xFF;
    key.keyByte[1] = 0xFF;
    key.keyByte[2] = 0xFF;
    key.keyByte[3] = 0xFF;
      key.keyByte[4] = 0xFF;
    key.keyByte[5] = 0xFF;
}

void readcardid(B4R::Object* o) {
    if ( ! mfrc522.PICC_IsNewCardPresent() ||  ! mfrc522.PICC_ReadCardSerial())
      {
        return;
     }
    
     Serial.print(F("Card UID:"));
    for (byte i = 0; i < mfrc522.uid.size; i++) {
           Serial.print(mfrc522.uid.uidByte[i] < 0x10 ? " 0" : " ");
        Serial.print(mfrc522.uid.uidByte[i], HEX);
    }
  Serial.println();
  (Byte*)b4r_main::_cardarray->mfrc522.uid.uidByte;
  mfrc522.PICC_HaltA();
  mfrc522.PCD_StopCrypto1();
}
#End If