help on making a save code

(I posted what my form looks like)
I'm having slight problems making my save code generator, which you enter your information into it, and it generates the save code for a game, but there are problems with some of the lines, which i have bolded

Dim fa As Single
Dim fb As Single
Dim fc As Single
Dim fd As Single
Dim levelno As Single
Dim clno As Single
Dim colour As Single
Dim skno As Single
Dim skilllevel As Single
Dim levelno2 As Single
Dim unlocked As Single
Dim nameleng As Single
Dim username = TextBox1
Dim savecode As Single
Dim roundno As Single
Dim clskno As Single


Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
If CheckBox1.Checked = True Then
fa = "Done"
End If
If CheckBox2.Checked = True Then
fb = "Done"
End If
If CheckBox3.Checked = True Then
fc = "Done"
End If
If CheckBox4.Checked = True Then
fd = "Done"
End If
If fa = "Done" Then
levelno = 0
End If
If fb = "Done" Then
levelno = levelno + 2
End If
If fc = "Done" Then
levelno = levelno + 4
End If
If fd = "Done" Then
levelno = levelno + 8
End If
If colour = "Yellow" Then
clno = 0
End If
If colour = "Orange" Then
clno = 1
End If
If colour = "White" Then
clno = 2
End If
If colour = "Blue" Then
clno = 3
End If
If colour = "Green" Then
clno = 4
End If
If colour = "Turquoise" Then
clno = 5
End If
If (skilllevel = "Normal") Then
skno = 0
End If
If (skilllevel = "Pro") Then
skno = 1
End If
If (skilllevel = "Easy") Then
skno = 2
End If
levelno2 = Chr(levelno + unlocked * 15 + 33)
If levelno2 = "0" Then
levelno2 = "z"
End If
nameleng = Chr(Number(username.length) + 8 * Rnd(3) + 65)
levelno = Chr(levelno + 65)
roundno = Chr(unlocked + 7 * Random(3) + 65)
clskno = Chr(Number(skno) * 6 + (Number(clno) + 65))
savecode = (username + "." + levelno2 + levelno + roundno + clskno + nameleng)
Label8.Visible = True
TextBox2.Visible = True
If TextBox1.TextLength < 9 Then
TextBox2.Text = savecode
End If
End Sub

Private Sub ComboBox1_SelectedIndexChanged(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles ComboBox1.SelectedIndexChanged
If ComboBox1.Text = "Orange" Then
colour = "Orange"
End If
If ComboBox1.Text = "Blue" Then
colour = "Blue"
End If
If ComboBox1.Text = "White" Then
colour = "White"
End If
If ComboBox1.Text = "Green" Then
colour = "Green"
End If
If ComboBox1.Text = "Turquoise" Then
colour = "Turquoise"
If ComboBox1.Text = "Yellow" Then
colour = "Yellow"
End If
End If
End Sub

Private Sub ComboBox2_SelectedIndexChanged(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles ComboBox2.SelectedIndexChanged
If ComboBox2.Text = "Easy" Then
skilllevel = "Easy"
End If
If ComboBox2.Text = "Normal" Then
skilllevel = "Normal"
End If
If ComboBox2.Text = "Pro" Then
skilllevel = "Pro"
End If
End Sub

That doesn't tell us WHAT the problem is, and the program doesn't sound like it's all that good, as in EVIL.

Code:

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' Use CODE TAGS also

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First of all, I'm only 13, pretty new at this, Second, my problems are:
1. Value of type 'char' can't be converted into 'single'
2. system.number is not accessible in this context because it is 'friend'

The first one applies to the strings starting with chr, and the second one applies to the Number statements

Probably should have had the coding specified, and the lines that have problems, so here:

Code:

---

    Dim fa As Single
    Dim fb As Single
    Dim fc As Single
    Dim fd As Single
    Dim levelno As Single
    Dim clno As Single
    Dim colour As Single
    Dim skno As Single
    Dim skilllevel As Single
    Dim levelno2 As Single
    Dim unlocked As Single
    Dim nameleng As Single
    Dim username = TextBox1
    Dim savecode As Single
    Dim roundno As Single
    Dim clskno As Single


    Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
        If CheckBox1.Checked = True Then
            fa = "Done"
        End If
        If CheckBox2.Checked = True Then
            fb = "Done"
        End If
        If CheckBox3.Checked = True Then
            fc = "Done"
        End If
        If CheckBox4.Checked = True Then
            fd = "Done"
        End If
        If fa = "Done" Then
            levelno = 0
        End If
        If fb = "Done" Then
            levelno = levelno + 2
        End If
        If fc = "Done" Then
            levelno = levelno + 4
        End If
        If fd = "Done" Then
            levelno = levelno + 8
        End If
        If colour = "Yellow" Then
            clno = 0
        End If
        If colour = "Orange" Then
            clno = 1
        End If
        If colour = "White" Then
            clno = 2
        End If
        If colour = "Blue" Then
            clno = 3
        End If
        If colour = "Green" Then
            clno = 4
        End If
        If colour = "Turquoise" Then
            clno = 5
        End If
        If (skilllevel = "Normal") Then
            skno = 0
        End If
        If (skilllevel = "Pro") Then
            skno = 1
        End If
        If (skilllevel = "Easy") Then
            skno = 2
        End If
        levelno2 = Chr(levelno + unlocked * 15 + 33)
        If levelno2 = "0" Then
            levelno2 = "z"
        End If
        nameleng = Chr(Number(username.length) + 8 * Rnd(3) + 65)
        levelno = Chr(levelno + 65)
        roundno = Chr(unlocked + 7 * Rnd(3) + 65)
        clskno = Chr(Number(skno) * 6 + (Number(clno) + 65))
        savecode = (username + "." + levelno2 + levelno + roundno + clskno + nameleng)
        Label8.Visible = True
        TextBox2.Visible = True
        If TextBox1.TextLength < 9 Then
            TextBox2.Text = savecode
        End If
    End Sub

    Private Sub ComboBox1_SelectedIndexChanged(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles ComboBox1.SelectedIndexChanged
        If ComboBox1.Text = "Orange" Then
            colour = "Orange"
        End If
        If ComboBox1.Text = "Blue" Then
            colour = "Blue"
        End If
        If ComboBox1.Text = "White" Then
            colour = "White"
        End If
        If ComboBox1.Text = "Green" Then
            colour = "Green"
        End If
        If ComboBox1.Text = "Turquoise" Then
            colour = "Turquoise"
            If ComboBox1.Text = "Yellow" Then
                colour = "Yellow"
            End If
        End If
    End Sub

    Private Sub ComboBox2_SelectedIndexChanged(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles ComboBox2.SelectedIndexChanged
        If ComboBox2.Text = "Easy" Then
            skilllevel = "Easy"
        End If
        If ComboBox2.Text = "Normal" Then
            skilllevel = "Normal"
        End If
        If ComboBox2.Text = "Pro" Then
            skilllevel = "Pro"
        End If
    End Sub

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The bolded parts are the parts it says have problems

Code:

---

  Dim namelengCHR as STRING
  nameleng = Number(username.length) + 8 * Rnd(3) + 65
  namelengCHR = Chr(nameleng)

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Or, even add your IF statement logic in between the lines

EDIT: Just noticed that you didn't declare nameleng as anything, which creates an OBJECT

Ok I was an idiot, and set everything to single by accident, changed them to Strings, but there's still the Problem of the number thing, but while it will build if i replace with FormatNumber, it still returns an error.

Post your code. No need for your own method to format the print