Visual Basic - Create an application to pick a number - vb.net

Question

Hye,
I'm new with Visual Basic and i had a few problems.
I've create a new Windows Forms Application in Visual Basic. Using one TextBox and two Button. The TextBox for displaying the number. One button for Generate and another one for Help.
I want to create a simple application that will pick one of the listed number instead of generating it.
Example :
Each time I click on the Generate button, it will pick either 14412GG or TE921W or 13123SA only. The number will appear in the TextBox.
Evertime i click on Help button, a windows will pop-up with help messages. Multiple line messages.
Public Class Form1
Private Sub Button1_Click(sender As Object, e As EventArgs) Handles Button1.Click
**This is for Generate button**
End Sub
Private Sub Button2_Click(sender As Object, e As EventArgs) Handles Button2.Click
**This is for Help button**
End Sub
Private Sub Form1_Load(sender As Object, e As EventArgs) Handles MyBase.Load
**This is to display the number**
End Sub
End Class

Answer 1

Save those 3 values in an arrayList, create a Random class.
private static ArrayList values1 = new ArrayList{"14412GG","TE921W","13123SA"};
Random rnd = new Random();
int r = rnd.Next(values1.Count);
(string)values1[r]
Display the string when Generate button clicks.
TextBoxVariable.Text = (string)values1[r];
Use Messagebox.Show to display the help message.
MessageBox.Show(""Help message line1" + Environment.NewLine + "Help message line2";");
Hope this helps!

Answer 2

Here is what you need :
'Button 1
Dim pool As String = "ABCDEFGHIJKLMNOPQURSTUVWXYZ1234567890"
Dim cc As New Random
Dim count = 0
While count <= 6
textbox1.text = cc.Next(0, pool.Length)
'button2
msgbox("message line1" + vbnewline + "message line2.")
i hope it be useful to you .