Threading, Delegates and the Invoke method.

[Sebouh]

Hi guys. I was messing with Threading and stuff, and i have reached a point where i'm not sure what's causing the current behavior.

Here's the code:

Public Class Form1

    Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
        Dim nt As New newThread(Me)
        Dim t As New Threading.Thread(AddressOf nt.ThreadCode)
        t.Start()
    End Sub

    Public Sub CreateMessageBox()
        Dim f As New Form()
        f.Show()
    End Sub
End Class


Public Class newThread

    Public Delegate Sub Inform()
    Public sendInform As Inform
    Public main As Form

    Public Sub New(ByRef main As Form1)
        Me.main = main
        sendInform = New Inform(AddressOf main.CreateMessageBox)
    End Sub

    Public Sub ThreadCode()
       Threading.Thread.Sleep(2000)
    '*********************************************
       sendInform() (VS) main.Invoke(sendInform)
    '***********************************
    End Sub
End Class

The problem is in the last statement, when i use main.Invoke() the CreatemessageBo x creates a msgbx, which is part of the Form1. But when i use sendInform() I get a messagebx that appears, but is part of the new thread. So if it were a Form instead of a msgbx, it would appear and then close as soon as the new thread exits.

My questionis , obviously, why? Why is one working the way i want it to and the other not.

My theory is that, when the main.invoke() is used, the loader(?) already assigns the address of the method as the main thread's Createmsgbx. But so when i use invoke(), it is somehow assigning the new thread's createmsgbx address. But i have a feeling i'm wrong, cause i know that threads share code, so the addresses must be the same. So why i one getting "assigned" as a call from the main thread, and the other as a method call from the new thread?

Thanks a lot.