'//TextBox1 is disabled when form load
Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
TextBox1.Enabled = False
End Sub
'//TextBox1 is enabled when you click on Button1
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
TextBox1.Enabled = True
End Sub