Delphi ActiveX

PC/SC List Smart Card Readers (and USB Tokens)

See more SCard Examples

Demonstrates how to list the smart card readers and USB tokens connected to the computer.

Note: This functionality was introduced in Chilkat v9.5.0.87.

Delphi ActiveX

uses
    Winapi.Windows, Winapi.Messages, System.SysUtils, System.Variants, System.Classes, Vcl.Graphics,
    Vcl.Controls, Vcl.Forms, Vcl.Dialogs, Vcl.StdCtrls, Chilkat_TLB;

...

procedure TForm1.Button1Click(Sender: TObject);
var
success: Integer;
scard: TChilkatSCard;
stReaders: TChilkatStringTable;
numReaders: Integer;
i: Integer;

begin
success := 0;

// This example requires the Chilkat API to have been previously unlocked.
// See Global Unlock Sample for sample code.

scard := TChilkatSCard.Create(Self);

// First establish a context to the PC/SC Resource Manager
success := scard.EstablishContext('user');
if (success = 0) then
  begin
    Memo1.Lines.Add(scard.LastErrorText);
    Exit;
  end;

stReaders := TChilkatStringTable.Create(Self);
success := scard.ListReaders(stReaders.ControlInterface);
if (success = 0) then
  begin
    Memo1.Lines.Add(scard.LastErrorText);
    Exit;
  end;

numReaders := stReaders.Count;
i := 0;
while i < numReaders do
  begin
    Memo1.Lines.Add(IntToStr(i) + ': ' + stReaders.StringAt(i));
    i := i + 1;
  end;

// Sample output:
// 0: Alcor Micro USB Smart Card Reader 0
// 1: FS USB Token 0
// 2: FT Java Token 0
// 3: SCM Microsystems Inc. SCR33x USB Smart Card Reader 0
// 4: Yubico YubiKey OTP+FIDO+CCID 0

// Applications should always release the context when finished.
success := scard.ReleaseContext();
if (success = 0) then
  begin
    Memo1.Lines.Add(scard.LastErrorText);
  end;
end;