(Unicode C++) Create Non-Multipart Email with XML Body that is an Attachment

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Creates an email where the only body is a binary WAV file. The technique used in the example could be applied to other binary files, such as PDF, MS-WORD docs, Excel docs, etc.

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#include <CkEmailW.h>
#include <CkMailManW.h>

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

    // The goal of this example is to create an email that has this MIME format,
    // where the body of the email is XML using base64 encoding, 
    // and the Content-Type and Content-Disposition are set as indicated.

    // Date: Wed, 23 Aug 2023 09:01:52 +0200 (CEST)
    // From: joe@example1.com
    // Subject: [v=EMCS.NL][a=NL****][k=****][s=0]
    // To: mary@example2.com
    // MIME-Version: 1.0
    // Content-Type: application/octet-stream; charset=us-ascii; name=6bd8dfe259b3a42c90a28a82b5fc6e77.txt
    // Content-Transfer-Encoding: Base64
    // Content-Disposition: attachment; filename=6bd8dfe259b3a42c90a28a82b5fc6e77.txt
    // Message-Id: <......>
    // 
    // <multi-line base64 encoded XML here>

    bool success = true;

    const wchar_t *xmlBody = L"<ie:IE801 xmlns:ie=\"urn:publicid:-:EC:DGTAXUD:EMCS:PHASE4:IE801:V3.01\" xmlns:tms=\"urn:publicid:-:EC:DGTAXUD:EMCS:PHASE4:TMS:V3.01\">....</ie:IE801>";

    CkEmailW email;

    // Add subject, TO, FROM, etc.
    email.put_Subject(L"[v=EMCS.NL][a=NL****][k=****][s=0]");
    email.put_From(L"joe@example1.com");
    success = email.AddTo(L"Mary",L"mary@example2.com");

    email.put_Body(xmlBody);

    email.AddHeaderField(L"Content-Transfer-Encoding",L"Base64");
    email.AddHeaderField(L"Content-Type",L"application/octet-stream; charset=us-ascii; name=6bd8dfe259b3a42c90a28a82b5fc6e77.txt");
    email.AddHeaderField(L"Content-Disposition",L"attachment; filename=6bd8dfe259b3a42c90a28a82b5fc6e77.txt");

    // Your email is ready to send
    CkMailManW mailman;

    mailman.put_SmtpHost(L"smtp.my_mail_server.com");
    mailman.put_SmtpUsername(L"myUsername");
    mailman.put_SmtpPassword(L"myPassword");
    mailman.put_SmtpPort(465);
    mailman.put_SmtpSsl(true);
    mailman.put_StartTLS(true);

    success = mailman.SendEmail(email);
    if (success != true) {
        wprintf(L"%s\n",mailman.lastErrorText());
        return;
    }

    success = mailman.CloseSmtpConnection();
    if (success != true) {
        wprintf(L"Connection to SMTP server not closed cleanly.\n");
    }

    wprintf(L"Mail Sent!\n");
    }