B4X

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.

B4X

Dim success As Boolean = False

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

Dim scard As ChilkatSCard
scard.Initialize("scard")

'  First establish a context to the PC/SC Resource Manager
success = scard.EstablishContext("user")
If success = False Then
    Log(scard.LastErrorText)
    Return
End If


Dim stReaders As ChilkatStringTable
stReaders.Initialize
success = scard.ListReaders(stReaders)
If success = False Then
    Log(scard.LastErrorText)
    Return
End If


Dim numReaders As Int = stReaders.Count
Dim i As Int = 0
Do While i < numReaders
    Log(i & ": " & stReaders.StringAt(i))
    i = i + 1
Loop

'  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 = False Then
    Log(scard.LastErrorText)
End If