Public Function BeginGetPart( _
   ByVal part As Stream, _
   ByVal peek As Boolean, _
   ByVal state As Object _
) As IAsyncResult

Dim instance As ImapMessage
Dim part As Stream
Dim peek As Boolean
Dim state As Object
Dim value As IAsyncResult
 
value = instance.BeginGetPart(part, peek, state)

public IAsyncResult BeginGetPart( 
   Stream part,
   bool peek,
   object state
)

public: IAsyncResult* BeginGetPart( 
   Stream* part,
   bool peek,
   Object* state
) 

public:
IAsyncResult^ BeginGetPart( 
   Stream^ part,
   bool peek,
   Object^ state
) 

Private Sub AsynchronousGetPartTest()
   ' Login 
   Imap1.Login(Server, User, Pass)

   ' Retrieve message outlines for INBOX.
   Imap1.CurrentMailbox.Get(Imap1.CurrentMailbox.Messages(0), Imap1.CurrentMailbox.Messages(Imap1.CurrentMailbox.Messages.Count - 1), ImapMessageSections.BodyStructure Or ImapMessageSections.Envelope)

   ' Find the first message with an attachment
   Dim Attach As MimeAttachmentStream
   Dim AttachMessage As ImapMessage
   Dim Msg As ImapMessage
   For Each Msg In Imap1.CurrentMailbox.Messages	
      If (Msg.Message.Attachments.Count > 0) Then
         Attach = Msg.Message.Attachments(0)
         AttachMessage = Msg
         Exit For
       End If
   Next
   
   ' Get the attachment. When complete the Imap.EndGetPart event will be raised
   AttachMessage.BeginGetPart(Attach, Nothing)
End Sub

Private Sub Imap1_EndGetPart(ByVal sender As Object, ByVal e As Dart.PowerTCP.Mail.MessagePartEventArgs) Handles Imap1.EndGetPart
   If e.Exception Is Nothing Then
      Debug.WriteLine("Part of message: " + e.Message.Id + " retrieved")
      Debug.WriteLine("Part Size = " & e.Part.Length)
   End If
End Sub

private void AsynchronousGetPartTest()
{
   // Login 
   imap1.Login(Server, User, Pass);

   // Retrieve message outlines for INBOX.
   imap1.CurrentMailbox.Get(imap1.CurrentMailbox.Messages[0], 
      imap1.CurrentMailbox.Messages[imap1.CurrentMailbox.Messages.Count - 1], 
      ImapMessageSections.BodyStructure | ImapMessageSections.Envelope);


   // Find the first message with an attachment
   MimeAttachmentStream attach = null;
   ImapMessage attachMessage = null;
   foreach(ImapMessage msg in imap1.CurrentMailbox.Messages)
   {
      if(msg.Message.Attachments.Count > 0)
      {
         // Save a reference to the attachment and message and break from the loop
         attach = (MimeAttachmentStream)msg.Message.Attachments[0];
         attachMessage = msg;
         break;
      }
   }
   
   // Get the attachment. When complete the Imap.EndGetPart event will be raised
   attachMessage.BeginGetPart(attach, null);
}

private void imap1_EndGetPart(object sender, Dart.PowerTCP.Mail.MessagePartEventArgs e)
{
   if(e.Exception == null)
   {
      Debug.WriteLine("Part of message: " + e.Message.Id + " retrieved");
      Debug.WriteLine("Part Size = " + e.Part.Length);
   }
}