VB.NET Invoke cannot be called on a control until the window handle has been created, BUT the handle is created - vb.net

Question

This is my situation, there are 2 Classes and my main form Form1:
Class1: has a method doSomethingAndCall(callback) which creates a new thread
Class2: has dynamic created controls with a button that fires Class1.doSomethingAndCall(newCallback)
in code it looks like this (it starts at Class2.Button_Click):
Class Class1
public shared sub doSomethingAndCallAsync(state as object)
Console.WriteLine(Form1.InvokeRequired) 'output: false
Console.WriteLine(Form1.IsHandleCreated) 'output: false
Form1.Invoke(state.callback) 'throws System.InvalidOperationException
end sub
public shared sub doSomethingAndCall(callback as object)
System.Threading.ThreadPool.QueueUserWorkItem(AddressOf doSomethingAndCallAsync, New With {.callback = callback})
end sub
End Class
Class Class2
Public Delegate Sub doSomethingDelegate()
Public Sub doSomething()
Console.WriteLine("success!")
End Sub
Public Sub Button_Click(ByVal sender As Object, ByVal e As System.EventArgs)
Class1.doSomethingAndCall(New doSomethingDelegate(AddressOf doSomething))
End Sub
End Class
The exact exception I get is:
Invoke or BeginInvoke cannot be called on a control until the window handle has been created
and as I can see the console.WriteLine in line 4 shows me that the form is realy not created. So I added this handlers, and now it get's really confusing:
Private Sub Form1_HandleCreated(sender As Object, e As System.EventArgs) Handles Me.HandleCreated
Console.WriteLine("Handle created") 'Output: Handle created, when running program
End Sub
Private Sub Form1_HandleDestroyed(sender As Object, e As System.EventArgs) Handles Me.HandleDestroyed
Console.WriteLine("Handle destroyed") 'Will never Output!
End Sub
So it's created and never destroyed but if i click the button it's nevertheless not avaible? -Can anyone explain me what is going on and how to call a callback correct, thanks!

Answer 1

The instance of My.Forms.Form1 aka. Form1 will be different in each thread. You need a handle to the correct instance. Drop a button onto your Form1 and add the following code:
Public Class Form1
Private Sub Button1_Click(sender As Object, e As EventArgs) Handles Button1.Click
Threading.Tasks.Task.Factory.StartNew(Sub() Class1.Wrong())
Threading.Tasks.Task.Factory.StartNew(Sub() Class1.Correct(Me))
End Sub
End Class
Public Class Class1
Public Shared Sub Wrong()
Debug.WriteLine(String.Format("(Other thread, wrong) InvokeRequired={0}, IsHandleCreated={1}", Form1.InvokeRequired, Form1.IsHandleCreated))
End Sub
Public Shared Sub Correct(instance As Form1)
Debug.WriteLine(String.Format("(Other thread, correct) InvokeRequired={0}, IsHandleCreated={1}", instance.InvokeRequired, instance.IsHandleCreated))
End Sub
End Class
Output
(Other thread, correct) InvokeRequired=True, IsHandleCreated=True
(Other thread, wrong) InvokeRequired=False, IsHandleCreated=False