Calling Main Thread from a worker thread in vb.net Documentation

I found this awesome example of calling a Main Thread from a worker
thread on abstractvb.com but I read through the example and would like
to see if anyone can clarify some of this code below:
Questions:

1. The Public Sub New proceedure. Is that just a proceedure named
new or is there more to this? I went through the code and I do not
see any refrences to 'New'

2.Does anyone have any really good links to threading articles. The
microsoft links that I have are not clearly illustrated.

Imports System.Threadin g

Public Delegate Sub CallBack(ByVal intTotal As Integer, ByVal
strThreadName As String)

Public Class Counter
Private LabelToUpdate As Label
Private MaxCount As Integer
Private CallBackMethod As CallBack

Public Sub New(ByVal l As Label, ByVal intMax As Integer, ByVal cb
As CallBack)
LabelToUpdate = l
MaxCount = intMax
CallBackMethod = cb
End Sub

Public Sub BeginProcessing ()
Dim i As Integer

For i = 1 To MaxCount
LabelToUpdate.T ext = i
LabelToUpdate.R efresh()
Next

CallBackMethod( i - 1, Thread.CurrentT hread.Name)
End Sub
End Class

Private Sub Button1_Click(B yVal sender As System.Object, ByVal e As
System.EventArg s) Handles Button1.Click
Dim c1 As New Counter(Label1, 3000, AddressOf ThreadCompleted )
Dim c2 As New Counter(Label2, 1000, AddressOf ThreadCompleted )

Dim t1 As New Thread(AddressO f c1.BeginProcess ing)
Dim t2 As New Thread(AddressO f c2.BeginProcess ing)

t1.Name = "Counter Thread 1"
t2.Name = "Counter Thread 2"

t1.Start()
t2.Start()
End Sub

Private Sub ThreadCompleted (ByVal intValue As Integer, ByVal strName
As String)
MsgBox("Thread " & strName & " has completed at " & intValue)
End Sub