(VB.NET) ScMinidriver - Change Smart Card PIN (or USB token PIN)

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Demonstrates how to change the PIN for a smart card or USB token.

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

Dim scmd As New Chilkat.ScMinidriver

' Reader names (smart card readers or USB tokens) can be discovered
' via List Readers or Find Smart Cards
Dim readerName As String = "Alcor Micro USB Smart Card Reader 0"
Dim success As Boolean = scmd.AcquireContext(readerName)
If (success = False) Then
    Debug.WriteLine(scmd.LastErrorText)
    Exit Sub
End If


' If successful, the name of the currently inserted smart card is available:
Debug.WriteLine("Card name: " & scmd.CardName)

' Change the "user" PIN.  (Typically, you'll always be using the "user" PIN.)
Dim currentPin As String = "0000"
Dim newPin As String = "1234"
Dim retval As Integer = scmd.PinChange("user",currentPin,newPin)
If (retval = -1) Then
    Debug.WriteLine("The PIN is already blocked.")
    Exit Sub
End If

If (retval = -2) Then
    Debug.WriteLine("The PinChange function failed for some unanticipated reason")
    Debug.WriteLine(scmd.LastErrorText)
    Exit Sub
End If

If (retval = 0) Then
    Debug.WriteLine("PIN successfully changed.")
Else
    Debug.WriteLine("Current PIN is incorrect.")
    Debug.WriteLine("Number of attempts remaining = " & retval)
End If


scmd.DeleteContext()