(VB.NET UWP/WinRT) Download POP3 Email using UIDLs

Demonstrates how to download POP3 email by first getting the complete set of UIDLs and then downloading email by calling FetchEmail for each UIDL. This is equivalent to calling CopyMail, except your application can process each email as it arrives instead of waiting for the entire bundle to be downloaded. Also, it's better protection against potential out-of-memory issues if your mailbox has a very large number of messages. There is no performance difference between fetching emails individually vs. calling CopyMail.

Chilkat Universal Windows Platform (UWP) / WinRT Downloads Chilkat for the Universal Windows Platform (UWP)

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

' The mailman object is used for receiving (POP3) 
' and sending (SMTP) email.
Dim mailman As New Chilkat.MailMan

' Set the POP3 server's hostname
mailman.MailHost = "pop.someMailServer.com"

' Set the POP3 login/password.
mailman.PopUsername = "myLogin"
mailman.PopPassword = "myPassword"

Dim sa As Chilkat.StringArray = Await mailman.GetUidlsAsync()
If (mailman.LastMethodSuccess <> True) Then
    Debug.WriteLine(mailman.LastErrorText)
    Exit Sub
End If

Dim i As Integer = 0
Dim n As Integer = sa.Count

Dim uidl As String

While i < n

    uidl = sa.GetString(i)

    Dim email As Chilkat.Email = Await mailman.FetchEmailAsync(uidl)
    If (mailman.LastMethodSuccess <> True) Then
        Debug.WriteLine(mailman.LastErrorText)

        Exit Sub
    End If

    Debug.WriteLine("From: " & email.From)
    Debug.WriteLine("Subject: " & email.Subject)


    i = i + 1
End While



Await mailman.Pop3EndSessionAsync()