word counter in vb.net

Unique words in a text box

Hi, please can any one help me to correct my code! It s/b a word,letter and uniq words counter (text box and tree list boxes to display # of letters, words and uniq words!
, but I am missing something!

Public Class Form1
Inherits System.Windows.Forms.Form

#Region " Windows Form Designer generated code "

Public Sub New()
MyBase.New()

'This call is required by the Windows Form Designer.
InitializeComponent()

'Add any initialization after the InitializeComponent() call

End Sub

'Form overrides dispose to clean up the component list.
Protected Overloads Overrides Sub Dispose(ByVal disposing As Boolean)
If disposing Then
If Not (components Is Nothing) Then
components.Dispose()
End If
End If
MyBase.Dispose(disposing)
End Sub

'Required by the Windows Form Designer
Private components As System.ComponentModel.IContainer

'NOTE: The following procedure is required by the Windows Form Designer
'It can be modified using the Windows Form Designer.
'Do not modify it using the code editor.
Friend WithEvents Button1 As System.Windows.Forms.Button
Friend WithEvents TextBox1 As System.Windows.Forms.TextBox
Friend WithEvents ListBox1 As System.Windows.Forms.ListBox
Friend WithEvents ListBox2 As System.Windows.Forms.ListBox
Friend WithEvents ListBox3 As System.Windows.Forms.ListBox
<System.Diagnostics.DebuggerStepThrough()> Private Sub InitializeComponent()
Me.Button1 = New System.Windows.Forms.Button()
Me.TextBox1 = New System.Windows.Forms.TextBox()
Me.ListBox1 = New System.Windows.Forms.ListBox()
Me.ListBox2 = New System.Windows.Forms.ListBox()
Me.ListBox3 = New System.Windows.Forms.ListBox()
Me.SuspendLayout()
'
'Button1
'
Me.Button1.Location = New System.Drawing.Point(176, 232)
Me.Button1.Name = "Button1"
Me.Button1.Size = New System.Drawing.Size(136, 24)
Me.Button1.TabIndex = 0
Me.Button1.Text = "Button1"
'
'TextBox1
'
Me.TextBox1.Location = New System.Drawing.Point(24, 8)
Me.TextBox1.Name = "TextBox1"
Me.TextBox1.Size = New System.Drawing.Size(464, 20)
Me.TextBox1.TabIndex = 1
Me.TextBox1.Text = "TextBox1"
'
'ListBox1
'
Me.ListBox1.Location = New System.Drawing.Point(24, 64)
Me.ListBox1.Name = "ListBox1"
Me.ListBox1.Size = New System.Drawing.Size(112, 160)
Me.ListBox1.Sorted = True
Me.ListBox1.TabIndex = 2
'
'ListBox2
'
Me.ListBox2.Location = New System.Drawing.Point(160, 64)
Me.ListBox2.Name = "ListBox2"
Me.ListBox2.Size = New System.Drawing.Size(152, 160)
Me.ListBox2.Sorted = True
Me.ListBox2.TabIndex = 3
'
'ListBox3
'
Me.ListBox3.Location = New System.Drawing.Point(328, 64)
Me.ListBox3.Name = "ListBox3"
Me.ListBox3.Size = New System.Drawing.Size(160, 160)
Me.ListBox3.Sorted = True
Me.ListBox3.TabIndex = 4
'
'Form1
'
Me.AutoScaleBaseSize = New System.Drawing.Size(5, 13)
Me.ClientSize = New System.Drawing.Size(512, 266)
Me.Controls.AddRange(New System.Windows.Forms.Control() {Me.ListBox3, Me.ListBox2, Me.ListBox1, Me.TextBox1, Me.Button1})
Me.Name = "Form1"
Me.Text = "Form1"
Me.ResumeLayout(False)

End Sub

#End Region

Private Sub ListBox2_SelectedIndexChanged(ByVal sender As System.Object, ByVal e As System.EventArgs)

End Sub

Private Sub TextBox1_TextChanged(ByVal sender As System.Object, ByVal e As System.EventArgs)
End Sub

Private Sub ListBox1_SelectedIndexChanged(ByVal sender As System.Object, ByVal e As System.EventArgs)
End Sub

Private Sub ListBox3_SelectedIndexChanged(ByVal sender As System.Object, ByVal e As System.EventArgs)

End Sub

Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
'Declare a String variable to put the text to be analyzed
Dim text As String

'Copy the text from the textbox and convert it to upper case
text = UCase(TextBox1.Text)

'Declare an array for number of occurences of each character
Dim letters(26) As Integer
Dim i As Int64
Dim j As Int64

'Initialize each character's count to 0
For i = 1 To 26
letters([i] = 0)
Next c

'we will put every word to the words() array
Dim word_count As Integer = 0
Dim words() As String

'inside_word will tell us whether we have started a word or are between words
Dim inside_word As Boolean = False

'we will append each character and construct the word, until we reach
'a non-letter character
Dim word As String = ""

'scan through the text, count each character's occurences, identify words
For i = 1 To Len(text)
Dim c As String = text(i)
If Asc(c) >= Asc("A") And Asc(c) <= Asc("Z") Then
'it is a letter!
'first, increment this letter's counter
letters[Asc(c)] = letters[Asc(c)] + 1

'if we have not started a word already, start it
If Not inside_word Then
inside_word = True
End If

'append this letter to the the word we are in
word = word & c
Else
'it is a non-letter character, cut the word
'make a room for it by expandin the array
word_count = word_count + 1
ReDim Preserve words(word_count)
words(word_count) = word
'reset the word so next letter starts with an empty word
inside_word = False
word = ""
End If
Next i
'if we ended at a non-letter character, last word is still in progress,
'put it into our array
If inside_word Then
word_count = word_count + 1
ReDim Preserve words(word_count)
words(word_count) = word
End If

'we now know each character's count as well as all words
'next thing to do is sort the words and identify unique words


'Bubble sort; slow algorithm, but works for sure
For i = 1 To word_count - 1
For j = i + 1 To word_count
If words(j) < words(i) Then
'swap the words
Dim temp As String = words(j)
words(j) = words(i)
words(i) = temp
End If
Next j
Next i

'words array is now sorted; scan through it, identify unique words

Dim unique_words() As String
Dim unique_word_count As Integer = 0
Dim last_word As String = ""

For i = 1 To word_count
'If next word is different than the previous, it is unique
If Not words(i) = last_word Then
'increase the counter
unique_word_count = unique_word_count + 1
'make a room for the new unique word
ReDim Preserve unique_words(unique_word_count)
'and put it into the unique_words array
unique_words(unique_word_count) = words(i)

'we will compare the next word to this one
last_word = words(i)
End If
Next i


'Everything is ready
'The only thing left is to put the results on the screen

'Let's start with the letter count
For i = 1 To 26
ListBox1.AddItem(Chr(i) & " : " || letters(i), i-1)
Next i

'Now, all words
For i = 1 To word_count
ListBox2.AddItem(words(i), i - 1)
Next i

'And finally, unique words
For i = 1 To unique_word_count
ListBox3.AddItem(unique_words(i), i - 1)
Next i

End Sub

Private Sub ListBox1_SelectedIndexChanged_1(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles ListBox1.SelectedIndexChanged

End Sub
End Class



thank you

:D