Fetch POP3 email headers with filtering (PayPal example)

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C++ code to download email headers matching a filter.

// The Chilkat Email library is also available as an ActiveX component
// or .NET class with the identical set of methods and properties.

// Fetch POP3 email headers with filtering.
// This example fetches PayPal payment notification email messages.
void EmailExample(void)
    {
    CkString str;
    CkMailMan mailman;

    // Any string passed to UnlockComponent begins the 30-day trial.
    bool unlocked = mailman.UnlockComponent("30-day trial");
    if (!unlocked)
	{
	printf("Failed to unlock component\n");
	return;
	}

    mailman.put_MailHost("mail.chilkatsoft.com");
    mailman.put_PopUsername("matt");
    mailman.put_PopPassword(myPassword);

    // Set the POP3 port to the standard MS Exchange Server SSL POP3 port 995
    // mailman.put_MailPort(995);
    // Tell the mailman to connect to POP3 using SSL
    // mailman.put_PopSsl(true);

    // Set our filter to only return PayPal payment notification emails.
    mailman.put_Filter("Subject like \"*Notification of Payment Received*\"");

    // Use GetAllHeaders to fetch each email header and the 1st N lines of
    // the body from a POP3 server. 
    CkEmailBundle *bundle = 0;
    bundle = mailman.GetAllHeaders(2);	// Get 2 body lines...
    if (!bundle)
	{
	mailman.LastErrorText(str);
	printf("%s",str.getString());
	return;
	}

    int i;
    int n = bundle->get_MessageCount();

    for (i=0; i<n; i++)
	{
	CkEmail *email = bundle->GetEmail(i);

	email->get_Subject(str);
	printf("Subject: %s\n",str.getString());

	email->get_From(str);
	printf("From: %s\n",str.getString());

	delete email;
	}

    delete bundle;

    return;
    }