Imports System.Net.NetworkInformation
Public Class Form1
    Private Sub Button1_Click(sender As System.Object, e As System.EventArgs) Handles Button1.Click
        Dim myComName As String = Environment.MachineName
        Dim myMac As String = getMacAddress()
        Label1.Text = myMac & "_" & myComName
    End Sub
    Function getMacAddress()
        Dim nics() As NetworkInterface = _
              NetworkInterface.GetAllNetworkInterfaces
        Return nics(0).GetPhysicalAddress.ToString
    End Function
End Class
 
vnote
Dim os() As String
Dim myuser() As String
Private Sub Form2_Load(sender As System.Object, e As System.EventArgs) Handles MyBase.Load
os = My.Computer.Info.OSFullName.Split(" ")
myuser = My.User.Name.Split("\")
Label1.Text = os(2)
Label2.Text = myuser(1)
End Sub
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