Public Class Form1

    Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
        'Get bigger number
        Dim num1, num2 As Double
        num1 = CDbl(txtfirstnum.Text)
        num2 = CDbl(txtsecondnum.Text)
        If (num1 > num2) Then
            ListBox1.Text = "The larger number is " & num1
        ElseIf (num2 > num1) Then
            ListBox1.Items.Add("The larger number is " & num2)
        ElseIf (num1 = num2) Then
            ListBox1.Items.Add("These numbers are the same")
        End If
    End Sub

    Private Sub Button2_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button2.Click
        ' add numbers
        Dim a, b As Double
        Dim result As Double

        a = geta()
        b = getb()

        result = ListBox1.Items.Add(a + b)
        'calcbigger (a, b)
    End Sub


    Function geta() As Double ' get first number
        Dim s As String
        Dim result As Double
        s = txtfirstnum.Text
        result = CDbl(s)
        Return result
    End Function

    Function getb() As Double ' get second number
        Dim s As String
        s = txtsecondnum.Text
        Return CDbl(s)
    End Function

    Private Sub Button3_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button3.Click

        'clear the listbox
        ListBox1.Items.Clear()

    End Sub

    Private Sub Button4_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button4.Click
        'ask if they want to exit program
        Dim n As Integer

        n = MsgBox("Are you sure you want to exit?"))
        If (n = MsgBoxResult.Yes) Then

        End If

    End Sub
End Class




















<Global.Microsoft.VisualBasic.CompilerServices.DesignerGenerated()> _
Partial Class Form1
    Inherits System.Windows.Forms.Form

    'Form overrides dispose to clean up the component list.
    <System.Diagnostics.DebuggerNonUserCode()> _
    Protected Overrides Sub Dispose(ByVal disposing As Boolean)
        If disposing AndAlso components IsNot Nothing Then
            components.Dispose()
        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.
    <System.Diagnostics.DebuggerStepThrough()> _
    Private Sub InitializeComponent()
        Me.components = New System.ComponentModel.Container
        Me.Label1 = New System.Windows.Forms.Label
        Me.Label2 = New System.Windows.Forms.Label
        Me.txtfirstnum = New System.Windows.Forms.TextBox
        Me.txtsecondnum = New System.Windows.Forms.TextBox
        Me.Button1 = New System.Windows.Forms.Button
        Me.BindingSource1 = New System.Windows.Forms.BindingSource(Me.components)
        Me.Button2 = New System.Windows.Forms.Button
        Me.Button3 = New System.Windows.Forms.Button
        Me.Button4 = New System.Windows.Forms.Button
        Me.ListBox1 = New System.Windows.Forms.ListBox
        CType(Me.BindingSource1, System.ComponentModel.ISupportInitialize).BeginInit()
        Me.SuspendLayout()
        '
        'Label1
        '
        Me.Label1.AutoSize = True
        Me.Label1.Location = New System.Drawing.Point(56, 32)
        Me.Label1.Name = "Label1"
        Me.Label1.Size = New System.Drawing.Size(67, 13)
        Me.Label1.TabIndex = 0
        Me.Label1.Text = "Number One"
        '
        'Label2
        '
        Me.Label2.AutoSize = True
        Me.Label2.Location = New System.Drawing.Point(56, 104)
        Me.Label2.Name = "Label2"
        Me.Label2.Size = New System.Drawing.Size(68, 13)
        Me.Label2.TabIndex = 1
        Me.Label2.Text = "Number Two"
        '
        'txtfirstnum
        '
        Me.txtfirstnum.Location = New System.Drawing.Point(135, 25)
        Me.txtfirstnum.Name = "txtfirstnum"
        Me.txtfirstnum.Size = New System.Drawing.Size(133, 20)
        Me.txtfirstnum.TabIndex = 2
        '
        'txtsecondnum
        '
        Me.txtsecondnum.Location = New System.Drawing.Point(135, 97)
        Me.txtsecondnum.Name = "txtsecondnum"
        Me.txtsecondnum.Size = New System.Drawing.Size(133, 20)
        Me.txtsecondnum.TabIndex = 3
        '
        'Button1
        '
        Me.Button1.Location = New System.Drawing.Point(135, 136)
        Me.Button1.Name = "Button1"
        Me.Button1.Size = New System.Drawing.Size(133, 45)
        Me.Button1.TabIndex = 4
        Me.Button1.Text = "Bigger"
        Me.Button1.UseVisualStyleBackColor = True
        '
        'Button2
        '
        Me.Button2.Location = New System.Drawing.Point(165, 62)
        Me.Button2.Name = "Button2"
        Me.Button2.Size = New System.Drawing.Size(69, 21)
        Me.Button2.TabIndex = 6
        Me.Button2.Text = "Add"
        Me.Button2.UseVisualStyleBackColor = True
        '
        'Button3
        '
        Me.Button3.Location = New System.Drawing.Point(59, 334)
        Me.Button3.Name = "Button3"
        Me.Button3.Size = New System.Drawing.Size(94, 35)
        Me.Button3.TabIndex = 7
        Me.Button3.Text = "Clear"
        Me.Button3.UseVisualStyleBackColor = True
        '
        'Button4
        '
        Me.Button4.Location = New System.Drawing.Point(229, 334)
        Me.Button4.Name = "Button4"
        Me.Button4.Size = New System.Drawing.Size(94, 35)
        Me.Button4.TabIndex = 8
        Me.Button4.Text = "Quit"
        Me.Button4.UseVisualStyleBackColor = True
        '
        'ListBox1
        '
        Me.ListBox1.FormattingEnabled = True
        Me.ListBox1.Location = New System.Drawing.Point(59, 200)
        Me.ListBox1.Name = "ListBox1"
        Me.ListBox1.Size = New System.Drawing.Size(293, 108)
        Me.ListBox1.TabIndex = 9
        '
        'Form1
        '
        Me.AutoScaleDimensions = New System.Drawing.SizeF(6.0!, 13.0!)
        Me.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font
        Me.ClientSize = New System.Drawing.Size(477, 438)
        Me.Controls.Add(Me.ListBox1)
        Me.Controls.Add(Me.Button4)
        Me.Controls.Add(Me.Button3)
        Me.Controls.Add(Me.Button2)
        Me.Controls.Add(Me.Button1)
        Me.Controls.Add(Me.txtsecondnum)
        Me.Controls.Add(Me.txtfirstnum)
        Me.Controls.Add(Me.Label2)
        Me.Controls.Add(Me.Label1)
        Me.Name = "Form1"
        Me.Text = "Form1"
        CType(Me.BindingSource1, System.ComponentModel.ISupportInitialize).EndInit()
        Me.ResumeLayout(False)
        Me.PerformLayout()

    End Sub
    Friend WithEvents Label1 As System.Windows.Forms.Label
    Friend WithEvents Label2 As System.Windows.Forms.Label
    Friend WithEvents txtfirstnum As System.Windows.Forms.TextBox
    Friend WithEvents txtsecondnum As System.Windows.Forms.TextBox
    Friend WithEvents Button1 As System.Windows.Forms.Button
    Friend WithEvents BindingSource1 As System.Windows.Forms.BindingSource
    Friend WithEvents Button2 As System.Windows.Forms.Button
    Friend WithEvents Button3 As System.Windows.Forms.Button
    Friend WithEvents Button4 As System.Windows.Forms.Button
    Friend WithEvents ListBox1 As System.Windows.Forms.ListBox

End Class