Quoted-Printable Encode/Decode a String

MFC example to quoted-printable encode and decode a string.

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// Needs #include <CkCrypt2.h>

    CkString strOut;

    CkCrypt2 crypt;

    //  Any string argument automatically begins the 30-day trial.
    bool success;
    success = crypt.UnlockComponent("30-day trial");
    if (success != true) {
        strOut.append(crypt.lastErrorText());
        strOut.append("\r\n");
        SetDlgItemText(IDC_EDIT1,strOut.getUnicode());
        return;
    }

    //  Here's a string in Icelandic using non us-ascii chars:
    const char * s;
    s = "Ég get etið gler án þess að meiða mig.";

    crypt.put_CryptAlgorithm("none");
    crypt.put_EncodingMode("quoted-printable");

    //  Quoted-printable encode/decode the iso-8859-1
    //  representation of the string.  Notice how each
    //  Icelandic char is represented by 1 byte:
    crypt.put_Charset("iso-8859-1");
    const char * qp;
    qp = crypt.encryptStringENC(s);
    strOut.append("iso-8859-1:");
    strOut.append("\r\n");
    strOut.append(qp);
    strOut.append("\r\n");
    const char * decoded;
    decoded = crypt.decryptStringENC(qp);
    strOut.append(decoded);
    strOut.append("\r\n");

    //  Now do the same using utf-8. Notice how each
    //  Icelandic char is represented by 2 bytes in utf-8:
    crypt.put_Charset("utf-8");

    qp = crypt.encryptStringENC(s);
    strOut.append("utf-8:");
    strOut.append("\r\n");
    strOut.append(qp);
    strOut.append("\r\n");

    decoded = crypt.decryptStringENC(qp);
    strOut.append(decoded);
    strOut.append("\r\n");

    SetDlgItemText(IDC_EDIT1,strOut.getUnicode());