[VB.Net] Get Product Key - Printable Version

Code:
Public Function GetProductKey(ByVal KeyPath As String, ByVal ValueName As String) As String
        Dim HexBuf As Object = My.Computer.Registry.GetValue(KeyPath, ValueName, 0)
        If HexBuf Is Nothing Then Return "N/A"
        Dim tmp As String = ""
        For l As Integer = LBound(HexBuf) To UBound(HexBuf)
            tmp = tmp & " " & Hex(HexBuf(l))
        Next
        Dim Digits(24) As String
        Digits(0) = "B" : Digits(1) = "C" : Digits(2) = "D" : Digits(3) = "F"
        Digits(4) = "G" : Digits(5) = "H" : Digits(6) = "J" : Digits(7) = "K"
        Digits(8) = "M" : Digits(9) = "P" : Digits(10) = "Q" : Digits(11) = "R"
        Digits(12) = "T" : Digits(13) = "V" : Digits(14) = "W" : Digits(15) = "X"
        Digits(16) = "Y" : Digits(17) = "2" : Digits(18) = "3" : Digits(19) = "4"
        Digits(20) = "6" : Digits(21) = "7" : Digits(22) = "8" : Digits(23) = "9"

        Dim HexDigitalPID(15) As String
        Dim Des(30) As String
        Dim tmp2 As String = ""
        Dim StartOffset As Integer = 52, EndOffset As Integer = 67
        For i = StartOffset To EndOffset
            HexDigitalPID(i - StartOffset) = HexBuf(i)
            tmp2 = tmp2 & " " & Hex(HexDigitalPID(i - StartOffset))
        Next
        Dim KEYSTRING As String = ""
        Dim dLen As Integer = 29
        For i As Integer = dLen - 1 To 0 Step -1
            If ((i + 1) Mod 6) = 0 Then
                Des(i) = "-"
                KEYSTRING = KEYSTRING & "-"
            Else
                Dim HN As Integer = 0
                Dim sLen As Integer = 15
                For N As Integer = (sLen - 1) To 0 Step -1
                    Dim Value As Integer = ((HN * 2 ^ 8) Or HexDigitalPID(N))
                    HexDigitalPID(N) = Value \ 24
                    HN = (Value Mod 24)
                Next
                Des(i) = Digits(HN)
                KEYSTRING = KEYSTRING & Digits(HN)
            End If
        Next
        Return StrReverse(KEYSTRING)
    End Function