Serial code

im wanting to make my program have to enter a serial and you dont have to enter anymore (Only once) if you want the full version, i have some code here, but i cant seem to get it to work properly, Can anyone help me? this is the last piece i have to do and its finished.

Code:

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Private Sub KryptonButton1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles KryptonButton1.Click
        If KryptonTextBox1.Text = "" Then
            MsgBox("Whoops! - Please make sure that all of the information with the * is filled out, and then try again!", MsgBoxStyle.Critical, "Whoops!")

        Else
         
                If KryptonTextBox1.Text = "N5869-N2201-N4859-N7832" Then
                    MsgBox("Thank you for registering, enjoy the full program! Noter will now restart to apply all changes!", MsgBoxStyle.Information, "Thank you!")
                    Form2.OptionsToolStripMenuItem.Enabled = True




                    Dim objStreamWriter As StreamWriter

                    'Pass the file path and the file name to the StreamWriter constructor.
                objStreamWriter = New StreamWriter("C:\NoterPRO.txt")

                    'Write a line of text.
                objStreamWriter.WriteLine("Serial encrypted")

                    'Close the file.
                    objStreamWriter.Close()



                objStreamWriter.Close()
                Dim retval As String
                retval = Dir$("c:\NoterPRO.txt")
                If retval = "Serial.txt" Then
                Form2.OptionsToolStripMenuItem.Enabled = True
                KryptonTextBox1.Text = "You have already registerd Noter!"
                KryptonTextBox1.Enabled = False
                    KryptonButton1.Enabled = False
                    Application.Restart()
            End If
        End If
            End If
    End Sub

---

Code:

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Private Sub Form2_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
        Dim retval As String
        retval = Dir$("c:\NoterPRO.txt")
        If retval = "Serial.txt" Then
            OptionsToolStripMenuItem.Enabled = True
            Form3.KryptonTextBox1.Text = "You have already registerd Noter!"
            Form3.KryptonTextBox1.Enabled = False
            Form3.KryptonButton1.Enabled = False
        End If
    End Sub

---

It would help if you stated what it is not doing properly. Simply saying it does not work does not tell us much.

OUCH!!!

Looking over the code that you've posted here .. this is not much of a Serial Protection key system..

Firstly the Key file is stored in the C: Root.... Not wise... While by Default the Boot partition is C: there are some systems that are not setup this way..

Next, your not parsing the file correctly..

Code:

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        retval = Dir$("c:\NoterPRO.txt")
        If retval = "Serial.txt" Then

---

Please check this MSDN page for how the DIR function works.. What you have here will NEVER resolve to True....

for a sample on how to implement this have a look at this thread..

I suggest not to use a single fixed hard-coded serial key!
It's called serial for a reason :)
Usually serial numbers are generated according to some scheme which also lets you check if a serial number is valid, like a checksum.

Its not retriving the key thats stored in C:\ its just ignoring it. (I know its not a good serial system, this is just a small program noting big, im not worried about it.)

As Gremlin pointed out above your code is way off

Code:

---

retval = Dir$("c:\NoterPRO.txt")     
    If retval = "Serial.txt" Then
            OptionsToolStripMenuItem.Enabled = True
            Form3.KryptonTextBox1.Text = "You have already registerd Noter!"
            Form3.KryptonTextBox1.Enabled = False
            Form3.KryptonButton1.Enabled = False
        End If

---

The dir statement will return the name of the file you searched for or will be blank but you are comparing it to somethihng different so it will never match under any conditions.

You also are not reading the file nor checking the content.

Id avoid the Dir function like a flesh eating plague.

You can use My.Computer.FileSystem.FileExists instead.