(C#) 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.

Chilkat.ScMinidriver scmd = new Chilkat.ScMinidriver();

// Reader names (smart card readers or USB tokens) can be discovered
// via List Readers or Find Smart Cards
string readerName = "Alcor Micro USB Smart Card Reader 0";
bool success = scmd.AcquireContext(readerName);
if (success == false) {
    Debug.WriteLine(scmd.LastErrorText);
    return;
}

// 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.)
string currentPin = "0000";
string newPin = "1234";
int retval = scmd.PinChange("user",currentPin,newPin);
if (retval == -1) {
    Debug.WriteLine("The PIN is already blocked.");
    return;
}

if (retval == -2) {
    Debug.WriteLine("The PinChange function failed for some unanticipated reason");
    Debug.WriteLine(scmd.LastErrorText);
    return;
}

if (retval == 0) {
    Debug.WriteLine("PIN successfully changed.");
}
else {
    Debug.WriteLine("Current PIN is incorrect.");
    Debug.WriteLine("Number of attempts remaining = " + Convert.ToString(retval));
}

scmd.DeleteContext();