(Visual Basic) Send High Priority Email (SMTP, X-Priority header)

Demonstrates how to send high-priorty email (or lower priority email) by setting the X-Priority header field.

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'  The mailman object is used for sending and receiving email.
Dim mailman As New ChilkatMailMan2

'  Any string argument automatically begins the 30-day trial.
Dim success As Long
success = mailman.UnlockComponent("30-day trial")
If (success <> 1) Then
    Text1.Text = Text1.Text & mailman.LastErrorText & vbCrLf
    Exit Sub
End If

'  Set the SMTP server (obviously, use your SMTP server, not chilkatsoft.com)
mailman.SmtpHost = "smtp.chilkatsoft.com"

'  Set the SMTP login/password (if required)
mailman.SmtpUsername = "myUsername"
mailman.SmtpPassword = "myPassword"

'  Create a new email object
Dim email As New ChilkatEmail2

email.Subject = "This is a test"
email.Body = "This is a test"
email.From = "Chilkat Support <support@chilkatsoft.com>"
email.AddTo "Chilkat Admin","admin@chilkatsoft.com"
'  To add more recipients, call AddTo, AddCC, or AddBcc once per recipient.

'  To send high-priority email,
'  add the X-Priority header field with the value "1"
'  to indicate highest-priority.
'  A value of "3" is normal, which is the same as not setting
'  the X-Priority header at all, and "5" is the lowest.
'  "2" and "4" are in-betweens.

'  Microsoft Outlook might add the following headers when
'  sending high-priority email.

'  X-Priority: 1 (Highest)
'  X-MSMail-Priority: High
'  Importance: High

'  The X-Priority header alone is enough to make the email high-priority.

email.AddHeaderField "X-Priority","1"

'  Call SendEmail to connect to the SMTP server and send.
'  The connection (i.e. session) to the SMTP server remains
'  open so that subsequent SendEmail calls may use the
'  same connection.
success = mailman.SendEmail(email)
If (success <> 1) Then
    Text1.Text = Text1.Text & mailman.LastErrorText & vbCrLf
    Exit Sub
End If

success = mailman.CloseSmtpConnection()
If (success <> 1) Then
    MsgBox "Connection to SMTP server not closed cleanly."
End If

MsgBox "Mail Sent!"