noob here....this is my very first VB.NET program.

What does it do? It displays a message box.

It worked.

I went to change the message and got an error?????????

Here is my extremely complex code
Code:
Public Class Form1

    Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
        MessageBox.Show("My first message box. ")

    End Sub
End Class
When I try to backspace or remove the text and replace it for something else, a little blue bar appears at the bottom of the screen and says:

"Cannot currently modify this text in the editor. It is read-only."

What the heck? Why can't I modify it in the editor?