OpenFileDialog1_FileOk event return NullReferenceException

I have the following code in Visual basic, Visual Studio 2017:

Private Sub OpenFileDialog1_FileOk(sender As Object, e As System.ComponentModel.CancelEventArgs) Handles OpenFileDialog1.FileOk
        CType(Controls(currEdit), Control).Text = OpenFileDialog1.FileName.ToString()
    End Sub

and I am getting this error that is not resolved ... I am following a video tutorial of making a DOCK / Louncher of applications, but it does not run at the end gives me this error:

System.NullReferenceException
  HResult=0x80004003
  Mensaje = Referencia a objeto no establecida como instancia de un objeto.
  Origen = GMDock
  Seguimiento de la pila:
   en GMDock.Settings.OpenFileDialog1_FileOk(Object sender, CancelEventArgs e) en E:\software\GMDock\GMDock\Settings.vb: línea 94
   en System.Windows.Forms.FileDialog.OnFileOk(CancelEventArgs e)
   en System.Windows.Forms.FileDialog.HandleVistaFileOk(IFileDialog dialog)
   en System.Windows.Forms.FileDialog.VistaDialogEvents.OnFileOk(IFileDialog pfd)

https://www.youtube.com/watch?v=pyCSdkdVFIE

sintax error on: currEdit value...

currEdit = "TexBox1"

like currEdit = "TextBox1" that is the reference...