VS 2012 Can you use an enum to enable or disable buttons?

I'm new to Visual Basic and I am stuck on a Tic Tac Toe exercise. I am trying to disable a button using a enum. Here is my code.

Public Class Form1
Public Enum Buttons As Byte
btn1 = 1
btn2 = 2
btn3 = 3
btn4 = 4
btn5 = 5
btn6 = 6
btn7 = 7
btn8 = 8
btn9 = 9
End Enum

Public Sub Computer()
Dim RandomNumberGenerator As New Random
Dim RandomNumber As Integer
RandomNumber = RandomNumberGenerator.Next(1, 9)
Dim RandomButton = CType(RandomNumber, Buttons)
Do
If RandomButton.Enabled = True Then
RandomButton.Enabled = False
RandomButton.Text = "O"
RandomButton.Font = New Font("Consolas", 50, FontStyle.Bold)
Exit Do
Else
RandomNumber = RandomNumberGenerator.Next(1, 9)
Dim RandomButton = CType(RandomNumber, Buttons)
End If
Loop

The If statement is not working. It says that RandomButton.Enabled is invalid. I wanted to know if there is a way to enable or disable a button using a enum. (Just as a note, if I replace "RandomButon.Enabled = true" with "btn1.enabled = true", it works fine. But I want to use a enum to disable a button.)