Invoke wont invoke? - vb.net

Question

I'm doing this:
Delegate Sub SetTextBoxText_Delegate(ByVal [Label] As TextBox, ByVal [text] As String)
' The delegates subroutine.
Public Sub SetTextBoxText_ThreadSafe(ByVal [Label] As TextBox, ByVal [text] As String)
' InvokeRequired required compares the thread ID of the calling thread to the thread ID of the creating thread.
' If these threads are different, it returns true.
If [Label].InvokeRequired Then
MsgBox("invoke")
Dim MyDelegate As New SetTextBoxText_Delegate(AddressOf SetTextBoxText_ThreadSafe)
Me.Invoke(MyDelegate, New Object() {[Label], [text]})
Else
MsgBox("noinvoke")
[Label].Text = [text]
End If
End Sub
However it always uses noinvoke. If I try setting it normaly it gives me a thread-safe warning and doesn't work. If I force invoke then it says the control isn't created?
Could someone help?

Answer 1

It's most likely because the control has not yet been created when you try to access it. Wait until the control has loaded, or check it using Label.Created. Like so:
Public Sub SetTextBoxText_ThreadSafe(ByVal Label As TextBox, ByVal text As String)
If Label.Created Then
If Label.InvokeRequired Then
MsgBox("invoke")
Dim MyDelegate As New SetTextBoxText_Delegate(AddressOf SetTextBoxText_ThreadSafe)
Me.Invoke(MyDelegate, New Object() {Label, text})
Else
MsgBox("noinvoke")
Label.Text = text
End If
End If
End Sub
P.S. You don't need a custom delegate type, just use Action(Of TextBox, String). You also don't need square brackets around Label or text.