(VB.NET) Download Unread Email from IMAP Mailbox

Download unread email messages from an IMAP mailbox.

Note: This example requires Chilkat v11.0.0 or greater.

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Dim success As Boolean = False

' This example assumes the Chilkat API to have been previously unlocked.
' See Global Unlock Sample for sample code.

Dim imap As New Chilkat.Imap

' Connect to an IMAP server.
' Use TLS
imap.Ssl = True
imap.Port = 993
success = imap.Connect("imap.example.com")
If (success = False) Then
    Debug.WriteLine(imap.LastErrorText)
    Exit Sub
End If


' Login
success = imap.Login("admin@chilkatsoft.com","myPassword")
If (success = False) Then
    Debug.WriteLine(imap.LastErrorText)
    Exit Sub
End If


' Select an IMAP mailbox
success = imap.SelectMailbox("Inbox")
If (success = False) Then
    Debug.WriteLine(imap.LastErrorText)
    Exit Sub
End If


' Find emails marked as seen or not already seen:
Dim seenSearch As String = "SEEN"
Dim notSeenSearch As String = "NOT SEEN"

' Get the set of unseen message UIDs
Dim fetchUids As Boolean = True
Dim messageSet As New Chilkat.MessageSet
success = imap.QueryMbx(notSeenSearch,fetchUids,messageSet)
If (success = False) Then
    Debug.WriteLine(imap.LastErrorText)
    Exit Sub
End If


' Fetch the unseen emails into a bundle object:
Dim bundle As New Chilkat.EmailBundle
Dim headersOnly As Boolean = False
success = imap.FetchMsgSet(headersOnly,messageSet,bundle)
If (success = False) Then
    Debug.WriteLine(imap.LastErrorText)
    Exit Sub
End If


' Display the Subject and From of each email.
Dim email As New Chilkat.Email
Dim i As Integer = 0
Dim numEmails As Integer = bundle.MessageCount
While i < numEmails
    bundle.EmailAt(i,email)

    Debug.WriteLine(email.GetHeaderField("Date"))
    Debug.WriteLine(email.Subject)
    Debug.WriteLine(email.From)
    Debug.WriteLine("--")
    i = i + 1
End While

' Disconnect from the IMAP server.
success = imap.Disconnect()