Option Explicit On 
Option Strict On
' to illustrate parallel arrays
Public Class Form1
    Inherits System.Windows.Forms.Form
    Dim numbers(200) As Integer
    Dim values(200) As String
    Dim numItems As Integer

#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 Label1 As System.Windows.Forms.Label
    Friend WithEvents LstInfo As System.Windows.Forms.ListBox
    Friend WithEvents Label2 As System.Windows.Forms.Label
    Friend WithEvents Label3 As System.Windows.Forms.Label
    Friend WithEvents TxtLookup As System.Windows.Forms.TextBox
    Friend WithEvents BtnLook As System.Windows.Forms.Button
    Friend WithEvents BtnQuit As System.Windows.Forms.Button
    Friend WithEvents TxtFound As System.Windows.Forms.TextBox
    Friend WithEvents Label4 As System.Windows.Forms.Label
    Friend WithEvents BtnClassLookup As System.Windows.Forms.Button
    <System.Diagnostics.DebuggerStepThrough()> Private Sub InitializeComponent()
        Me.Label1 = New System.Windows.Forms.Label
        Me.LstInfo = New System.Windows.Forms.ListBox
        Me.Label2 = New System.Windows.Forms.Label
        Me.Label3 = New System.Windows.Forms.Label
        Me.TxtLookup = New System.Windows.Forms.TextBox
        Me.BtnLook = New System.Windows.Forms.Button
        Me.BtnQuit = New System.Windows.Forms.Button
        Me.TxtFound = New System.Windows.Forms.TextBox
        Me.Label4 = New System.Windows.Forms.Label
        Me.BtnClassLookup = New System.Windows.Forms.Button
        Me.SuspendLayout()
        '
        'Label1
        '
        Me.Label1.AutoSize = True
        Me.Label1.Font = New System.Drawing.Font("Microsoft Sans Serif", 18.0!, System.Drawing.FontStyle.Bold, System.Drawing.GraphicsUnit.Point, CType(0, Byte))
        Me.Label1.Location = New System.Drawing.Point(227, 35)
        Me.Label1.Name = "Label1"
        Me.Label1.Size = New System.Drawing.Size(155, 31)
        Me.Label1.TabIndex = 0
        Me.Label1.Text = "Look Up Key"
        '
        'LstInfo
        '
        Me.LstInfo.Location = New System.Drawing.Point(40, 132)
        Me.LstInfo.Name = "LstInfo"
        Me.LstInfo.Size = New System.Drawing.Size(180, 251)
        Me.LstInfo.TabIndex = 1
        '
        'Label2
        '
        Me.Label2.Font = New System.Drawing.Font("Microsoft Sans Serif", 10.2!, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, CType(0, Byte))
        Me.Label2.Location = New System.Drawing.Point(33, 90)
        Me.Label2.Name = "Label2"
        Me.Label2.Size = New System.Drawing.Size(187, 28)
        Me.Label2.TabIndex = 2
        Me.Label2.Text = "All Info"
        '
        'Label3
        '
        Me.Label3.Font = New System.Drawing.Font("Microsoft Sans Serif", 10.2!, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, CType(0, Byte))
        Me.Label3.Location = New System.Drawing.Point(293, 132)
        Me.Label3.Name = "Label3"
        Me.Label3.Size = New System.Drawing.Size(120, 21)
        Me.Label3.TabIndex = 3
        Me.Label3.Text = "Look Up:"
        '
        'TxtLookup
        '
        Me.TxtLookup.Location = New System.Drawing.Point(433, 132)
        Me.TxtLookup.Name = "TxtLookup"
        Me.TxtLookup.Size = New System.Drawing.Size(87, 20)
        Me.TxtLookup.TabIndex = 4
        Me.TxtLookup.Text = ""
        '
        'BtnLook
        '
        Me.BtnLook.Location = New System.Drawing.Point(300, 180)
        Me.BtnLook.Name = "BtnLook"
        Me.BtnLook.Size = New System.Drawing.Size(107, 35)
        Me.BtnLook.TabIndex = 5
        Me.BtnLook.Text = "Look Up"
        '
        'BtnQuit
        '
        Me.BtnQuit.Location = New System.Drawing.Point(433, 180)
        Me.BtnQuit.Name = "BtnQuit"
        Me.BtnQuit.Size = New System.Drawing.Size(107, 35)
        Me.BtnQuit.TabIndex = 6
        Me.BtnQuit.Text = "Quit"
        '
        'TxtFound
        '
        Me.TxtFound.Location = New System.Drawing.Point(440, 257)
        Me.TxtFound.Name = "TxtFound"
        Me.TxtFound.ReadOnly = True
        Me.TxtFound.Size = New System.Drawing.Size(173, 20)
        Me.TxtFound.TabIndex = 8
        Me.TxtFound.Text = ""
        '
        'Label4
        '
        Me.Label4.Font = New System.Drawing.Font("Microsoft Sans Serif", 10.2!, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, CType(0, Byte))
        Me.Label4.Location = New System.Drawing.Point(300, 257)
        Me.Label4.Name = "Label4"
        Me.Label4.Size = New System.Drawing.Size(120, 20)
        Me.Label4.TabIndex = 7
        Me.Label4.Text = "Found"
        '
        'BtnClassLookup
        '
        Me.BtnClassLookup.Location = New System.Drawing.Point(264, 80)
        Me.BtnClassLookup.Name = "BtnClassLookup"
        Me.BtnClassLookup.Size = New System.Drawing.Size(112, 40)
        Me.BtnClassLookup.TabIndex = 9
        Me.BtnClassLookup.Text = "LookUpClass"
        '
        'Form1
        '
        Me.AutoScaleBaseSize = New System.Drawing.Size(5, 13)
        Me.ClientSize = New System.Drawing.Size(639, 464)
        Me.Controls.Add(Me.BtnClassLookup)
        Me.Controls.Add(Me.TxtFound)
        Me.Controls.Add(Me.Label4)
        Me.Controls.Add(Me.BtnQuit)
        Me.Controls.Add(Me.BtnLook)
        Me.Controls.Add(Me.TxtLookup)
        Me.Controls.Add(Me.Label3)
        Me.Controls.Add(Me.Label2)
        Me.Controls.Add(Me.LstInfo)
        Me.Controls.Add(Me.Label1)
        Me.Name = "Form1"
        Me.Text = "Form1"
        Me.ResumeLayout(False)

    End Sub

#End Region

    Private Sub BtnQuit_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles BtnQuit.Click
        Me.Close()

    End Sub

    Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load

        Dim inpf As IO.StreamReader
        If IO.File.Exists("info.txt") Then
            inpf = IO.File.OpenText("info.txt")
            Do While inpf.Peek <> -1 And numItems <= 200
                Dim curr As Integer
                Dim currStr As String
                Dim currLine As String
                Dim currVal As String
                currLine = inpf.ReadLine()
                Dim commapos As Integer
                commapos = currLine.IndexOf(",")
                currStr = currLine.Substring(0, commapos)
                curr = Convert.ToInt32(currStr)
                numbers(numItems) = curr
                currVal = currLine.Substring(commapos + 1)
                values(numItems) = currVal
                numItems = numItems + 1
                LstInfo.Items.Add(currLine)

            Loop
        End If
    End Sub

    Private Sub BtnLook_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles BtnLook.Click
        Dim lookup As Double
        Dim value As String
        Dim found As Boolean = False
        If IsNumeric(TxtLookup.Text) Then
            lookup = Convert.ToDouble(TxtLookup.Text)
            Dim cnt As Integer
            For cnt = 0 To numItems
                If numbers(cnt) = lookup Then
                    TxtFound.Text = values(cnt)
                    found = True
                End If
            Next
            If Not found Then
                TxtFound.Text = ""
                MsgBox("That number is not found")
            End If 
        Else
            MsgBox("look up value must be numeric")

        End If
    End Sub

    Private Sub BtnClassLookup_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles BtnClassLookup.Click
        Dim toLookup As Integer
        Dim movieName As String
        Dim cnt As Integer
        Dim whereFound As Integer = Nothing


        If IsNumeric(TxtLookup.Text) Then
            toLookup = Convert.ToInt32(TxtLookup.Text)
            For cnt = 0 To numItems - 1
                If toLookup = numbers(cnt) Then
                    ' found the number
                    whereFound = cnt
                End If
            Next cnt
            If whereFound = Nothing Then
                MsgBox("I'm sorry, that movie is not found")
            Else
                ' found 
                movieName = values(whereFound)
                TxtFound.Text = movieName

            End If
        Else
            MsgBox("movie number to lookup needs to be a number")

        End If
    End Sub
End Class