Reading a tag using winScard.dll

Hello,

my name is Frederic. For two weeks I've been working on the task to read the tag, and a stored link, of an active NFV TI Chip.
I also have a problem reading the ATR.

My reader is a Springcard H663.

I use the winScard.dll and managed to use SCardEstablishContext() and SCardConnect() sucessfully to get to work, including them as an wrapper.

Now I have issues for a week and nothing is moving forward.

I do not know how to access the tag or the stored Information or which values to give to the function.

[StructLayout(LayoutKind.Sequential)]

 public struct SCARD_IO_REQUEST     { public int dwProtocol; public int cbPciLength; }
and

[DllImport("WinScard.dll")] public static extern int SCardTransmit( IntPtr hCard, ref SCARD_IO_REQUEST pioSendPci, ref byte[] pbSendBuffer, int cbSendLength, ref SCARD_IO_REQUEST pioRecvPci, ref byte[] pbRecvBuffer, ref int pcbRecvLength);
are the implementation of the io structure and the wrapper.

This is the way I tried to access the information:

internal static void _readtag(string readername) {

 IntPtr phCard = IntPtr.Zero; IntPtr activeProtocoll = IntPtr.Zero; try {            get_readerconnection(readername, (uint)PROTOCOL_T1 ,phCard, activeProtocoll);// SCardEstablishContext and SCardConnection int Rueckgabewert;               SCARD_IO_REQUEST ioRequest = new SCARD_IO_REQUEST();             ioRequest.dwProtocol = (int)wrapper.PROTOCOL_T0;             ioRequest.cbPciLength = 8; byte[] commandBytes = new byte[] { 0xFF, 0xCA, 0x00, 0x00, 0x00 }; byte[] reciveBytes = new byte[10]; int rcvLenght = 0; Rueckgabewert = SCardTransmit(phCard,ref ioRequest, ref commandBytes,commandBytes.Length, ref ioRequest, ref reciveBytes, ref rcvLenght); if (Rueckgabewert != 0) Console.WriteLine("Failed querying tag UID: " + Error_in_String((uint)Rueckgabewert)); Console.WriteLine(Methoden.ByteToString(reciveBytes));              wrapper.SCardDisconnect(phCard, 0); } finally {             wrapper.SCardReleaseContext(phCard); } return;
To be complete I show you my ByteToString function:

public static string ByteToString(byte[] ByteArray) { ASCIIEncoding ascii = new ASCIIEncoding(); string multi_string = ascii.GetString(ByteArray); return multi_string; }
also my get_readerconnection(...) function:

 internal static void get_readerconnection(string readername, uint Reader_Protocol ,IntPtr phCard, IntPtr ActiveProtocol ) { try {   phCard = IntPtr.Zero; ActiveProtocol = IntPtr.Zero; IntPtr hContext = get_hContext(); // using mode =2 // readerprotocol =3 int result = SCardConnect(hContext, readername, 2, Reader_Protocol, ref phCard, ref ActiveProtocol); Error_in_String((uint)result); } catch { } }
My problem is how do I adress the _readertag(..) function for getting the tag, the link or the ATR.And how can I display the result?

I searched the web, but most of the codes are to far advanced for me to understand and msdn does not help me, also the code on code-project is to complicated for me.

I would be very thankful for your help!

Frederic