Visual Basic

Dim myIP as IPAddress = "some.ip.addr.255"
Dim myPort as Integer = someport

private const myCmd as string = "43:44:50:00:01:00:00:00:00:00:00:00:00:ff:00:00:00:00:00:00:00:03:00:06:00:00:00:28:c0:a8:fc:fa:00"
dim HexSplit() as string = split(myCmd, ":")
dim byteCMD as byte() = new byte()

'but then??
'is this the way to proceed?
dim lCounter as integer
for each hS in HexSplit 
   byteCmd(lcounter) = CByte(Val("&H" + hS))
   lcounter += 1
next
udpClient.Connect(myIP, myPort)
mRet = udpClient.Send(byteCmd, byteCmd.length)

Public Class Form1

    Private Sub Button1_Click(sender As Object, e As EventArgs) Handles Button1.Click
        Dim a As New doSomething
        Dim s As New Threading.Thread(AddressOf a.update)
        s.IsBackground = True
        s.Start()
    End Sub
End Class

Public Class doSomething

    Public Sub update()
        SetControlText(Form1.TextBox1, "Hey Please Update the Textbox")
    End Sub


    Private Delegate Sub SetControlTextInvoker(ByVal ctl As Control, ByVal text As String)

    Private Sub SetControlText(ByVal ctl As Control, ByVal text As String)
        If ctl.InvokeRequired Then
            ctl.Invoke(New SetControlTextInvoker(AddressOf SetControlText), _
                       ctl, _
                       text)
        Else
            ctl.Text = text
        End If
    End Sub

End Class

 ' the following three lines return NOTHING
Dim one_card as UserControl = FindControl("Card0")
Dim one_card as Card = FindControl("Card0")
Dim one_card as Control = FindControl("Card0")