AuthenticateCompleted Event

public event AsyncCompletedEventHandler AuthenticateCompleted

Public Event AuthenticateCompleted AsyncCompletedEventHandler

public:
 event AsyncCompletedEventHandler^ AuthenticateCompleted

Asynchronously connect to a POP3 server and list recent messages.

using System;
using System.Text;
using ComponentPro.Net.Mail;
using ComponentPro;

...

// Create a new instance.
Pop3 client = new Pop3();

// Connect to the POP3 server asynchronously. 
await client.ConnectAsync("myserver");

// Or you can specify the POP3 port with 
// client.ConnectAsync("myserver", 110); 
 
// Authenticate the user asynchronously. 
await client.AuthenticateAsync("userName", "password");

// Do something here...
StringBuilder sb = new StringBuilder();

Pop3MessageCollection list = client.ListMessages(Pop3EnvelopeParts.Size | Pop3EnvelopeParts.UniqueId);
for (int i = 0; i < list.Count; i++)
{
    sb.AppendFormat("{0} - {1}\r\n", i + 1, list[i].UniqueId);
}

Console.WriteLine(sb.ToString());

// ... 
 
// Disconnect asynchronously. 
await client.DisconnectAsync();

// ...

Imports System.Text
Imports ComponentPro.Net.Mail
Imports ComponentPro

...

' Create a new instance. 
Dim client As New Pop3()

' Connect to the POP3 server asynchronously. 
Await client.ConnectAsync("myserver")

' Or you can specify the POP3 port with 
' client.ConnectAsync("myserver", 110); 
 
' Authenticate the user asynchronously. 
Await client.AuthenticateAsync("userName", "password")

' Do something here... 
Dim sb As New StringBuilder()

Dim list As Pop3MessageCollection = client.ListMessages(Pop3EnvelopeParts.Size Or Pop3EnvelopeParts.UniqueId)
For i As Integer = 0 To list.Count - 1
    sb.AppendFormat("{0} - {1}" & vbCrLf, i + 1, list(i).UniqueId)
Next i

Console.WriteLine(sb.ToString())

' ... 
 
' Disconnect asynchronously. 
Await client.DisconnectAsync()

' ...

Asynchronously connect to a POP3 server and list recent messages.

using System;
using System.ComponentModel;
using System.Text;
using ComponentPro;
using ComponentPro.Net.Mail;

...

public void DoAsyncConnect()
{
    // Create a new instance. 
    Pop3 client = new Pop3();

    client.ConnectCompleted += client_ConnectCompleted;
    client.AuthenticateCompleted += client_AuthenticateCompleted;
    client.DisconnectCompleted += client_DisconnectCompleted;

    // Connect to the POP3 server asynchronously. 
    client.ConnectAsync("myserver");

    // Or you can specify the POP3 port with 
    // client.ConnectAsync("myserver", 110); 
 
    // Your code here 
    // ...
}

void client_ConnectCompleted(object sender, ExtendedAsyncCompletedEventArgs<string> e)
{
    Pop3 client = (Pop3)sender;
    if (e.Error != null)
    {
        Console.WriteLine("Error: " + e.Error.ToString());
        return;
    }

    // Authenticate the user asynchronously. 
    client.AuthenticateAsync("userName", "password");
}

void client_AuthenticateCompleted(object sender, AsyncCompletedEventArgs e)
{
    Pop3 client = (Pop3)sender;
    if (e.Error != null)
    {
        Console.WriteLine("Error: " + e.Error.ToString());
        return;
    }

    // Do something here... 
    StringBuilder sb = new StringBuilder();

    Pop3MessageCollection list = client.ListMessages(Pop3EnvelopeParts.Size | Pop3EnvelopeParts.UniqueId);
    for (int i = 0; i < list.Count; i++)
    {
        sb.AppendFormat("{0} - {1}\r\n", i + 1, list[i].UniqueId);
    }

    Console.WriteLine(sb.ToString());

    // ... 
 
    // Disconnect asynchronously. 
    client.DisconnectAsync();
}

void client_DisconnectCompleted(object sender, ExtendedAsyncCompletedEventArgs<string> e)
{
    if (e.Error != null)
        Console.WriteLine("Error: " + e.Error.ToString());
}

Imports System.ComponentModel
Imports System.Text
Imports ComponentPro
Imports ComponentPro.Net.Mail

...

Public Sub DoAsyncConnect()
    ' Create a new instance. 
    Dim client As New Pop3()

    AddHandler client.ConnectCompleted, AddressOf client_ConnectCompleted
    AddHandler client.AuthenticateCompleted, AddressOf client_AuthenticateCompleted
    AddHandler client.DisconnectCompleted, AddressOf client_DisconnectCompleted

    ' Connect to the POP3 server asynchronously. 
    client.ConnectAsync("myserver")

    ' Or you can specify the POP3 port with 
    ' client.ConnectAsync("myserver", 110); 
 
    ' Your code here 
    ' ... 
End Sub 
 
Private Sub client_ConnectCompleted(ByVal sender As Object, ByVal e As ExtendedAsyncCompletedEventArgs(Of String))
    Dim client As Pop3 = CType(sender, Pop3)
    If e.Error IsNot Nothing Then 
        Console.WriteLine("Error: " & e.Error.ToString())
        Return 
    End If 
 
    ' Authenticate the user asynchronously. 
    client.AuthenticateAsync("userName", "password")
End Sub 
 
Private Sub client_AuthenticateCompleted(ByVal sender As Object, ByVal e As AsyncCompletedEventArgs)
    Dim client As Pop3 = CType(sender, Pop3)
    If e.Error IsNot Nothing Then 
        Console.WriteLine("Error: " & e.Error.ToString())
        Return 
    End If 
 
    ' Do something here... 
    Dim sb As New StringBuilder()

    Dim list As Pop3MessageCollection = client.ListMessages(Pop3EnvelopeParts.Size Or Pop3EnvelopeParts.UniqueId)
    For i As Integer = 0 To list.Count - 1
        sb.AppendFormat("{0} - {1}" & vbCrLf, i + 1, list(i).UniqueId)
    Next i

    Console.WriteLine(sb.ToString())

    ' ... 
 
    ' Disconnect asynchronously. 
    client.DisconnectAsync()
End Sub 
 
Private Sub client_DisconnectCompleted(ByVal sender As Object, ByVal e As ExtendedAsyncCompletedEventArgs(Of String))
    If e.Error IsNot Nothing Then 
        Console.WriteLine("Error: " & e.Error.ToString())
    End If 
End Sub

Reference