Public Class MathForm
    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
    Friend WithEvents ProblemGroupBox As System.Windows.Forms.GroupBox
    Friend WithEvents AnswerTextBox As System.Windows.Forms.TextBox
    Friend WithEvents OperationGroupBox As System.Windows.Forms.GroupBox
    Friend WithEvents AdditionRadioButton As System.Windows.Forms.RadioButton
    Friend WithEvents IdCorrectLabel As System.Windows.Forms.Label
    Friend WithEvents IdIncorrectLabel As System.Windows.Forms.Label
    Friend WithEvents CorrectLabel As System.Windows.Forms.Label
    Friend WithEvents IncorrectLabel As System.Windows.Forms.Label
    Friend WithEvents ExitButton As System.Windows.Forms.Button
    Friend WithEvents SummaryGroupBox As System.Windows.Forms.GroupBox
    Friend WithEvents PlusPictureBox As System.Windows.Forms.PictureBox
    Friend WithEvents MinusPictureBox As System.Windows.Forms.PictureBox
    Friend WithEvents CheckAnswerButton As System.Windows.Forms.Button
    Friend WithEvents HappyPictureBox As System.Windows.Forms.PictureBox
    Friend WithEvents NeutralPictureBox As System.Windows.Forms.PictureBox
    Friend WithEvents Grade2RadioButton As System.Windows.Forms.RadioButton
    Friend WithEvents GradeGroupBox As System.Windows.Forms.GroupBox
    Friend WithEvents Grade1RadioButton As System.Windows.Forms.RadioButton
    Friend WithEvents SubtractionRadioButton As System.Windows.Forms.RadioButton
    Friend WithEvents SummaryCheckBox As System.Windows.Forms.CheckBox

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

    '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 TbxNum1 As System.Windows.Forms.TextBox
    Friend WithEvents TbxNum2 As System.Windows.Forms.TextBox
    Friend WithEvents LblSymbol As System.Windows.Forms.Label
    Friend WithEvents Label1 As System.Windows.Forms.Label
    <System.Diagnostics.DebuggerStepThrough()> Private Sub InitializeComponent()
        Me.IdCorrectLabel = New System.Windows.Forms.Label
        Me.SummaryCheckBox = New System.Windows.Forms.CheckBox
        Me.PlusPictureBox = New System.Windows.Forms.PictureBox
        Me.OperationGroupBox = New System.Windows.Forms.GroupBox
        Me.AdditionRadioButton = New System.Windows.Forms.RadioButton
        Me.SubtractionRadioButton = New System.Windows.Forms.RadioButton
        Me.AnswerTextBox = New System.Windows.Forms.TextBox
        Me.SummaryGroupBox = New System.Windows.Forms.GroupBox
        Me.CorrectLabel = New System.Windows.Forms.Label
        Me.IdIncorrectLabel = New System.Windows.Forms.Label
        Me.IncorrectLabel = New System.Windows.Forms.Label
        Me.ProblemGroupBox = New System.Windows.Forms.GroupBox
        Me.LblSymbol = New System.Windows.Forms.Label
        Me.TbxNum2 = New System.Windows.Forms.TextBox
        Me.TbxNum1 = New System.Windows.Forms.TextBox
        Me.ExitButton = New System.Windows.Forms.Button
        Me.CheckAnswerButton = New System.Windows.Forms.Button
        Me.GradeGroupBox = New System.Windows.Forms.GroupBox
        Me.Grade1RadioButton = New System.Windows.Forms.RadioButton
        Me.Grade2RadioButton = New System.Windows.Forms.RadioButton
        Me.MinusPictureBox = New System.Windows.Forms.PictureBox
        Me.NeutralPictureBox = New System.Windows.Forms.PictureBox
        Me.HappyPictureBox = New System.Windows.Forms.PictureBox
        Me.Label1 = New System.Windows.Forms.Label
        Me.OperationGroupBox.SuspendLayout()
        Me.SummaryGroupBox.SuspendLayout()
        Me.ProblemGroupBox.SuspendLayout()
        Me.GradeGroupBox.SuspendLayout()
        Me.SuspendLayout()
        '
        'IdCorrectLabel
        '
        Me.IdCorrectLabel.AutoSize = True
        Me.IdCorrectLabel.Font = New System.Drawing.Font("Tahoma", 9.75!, System.Drawing.FontStyle.Bold, System.Drawing.GraphicsUnit.Point, CType(0, Byte))
        Me.IdCorrectLabel.Location = New System.Drawing.Point(8, 16)
        Me.IdCorrectLabel.Name = "IdCorrectLabel"
        Me.IdCorrectLabel.Size = New System.Drawing.Size(59, 19)
        Me.IdCorrectLabel.TabIndex = 0
        Me.IdCorrectLabel.Text = "Correct:"
        '
        'SummaryCheckBox
        '
        Me.SummaryCheckBox.Font = New System.Drawing.Font("Tahoma", 9.75!, System.Drawing.FontStyle.Bold, System.Drawing.GraphicsUnit.Point, CType(0, Byte))
        Me.SummaryCheckBox.Location = New System.Drawing.Point(336, 144)
        Me.SummaryCheckBox.Name = "SummaryCheckBox"
        Me.SummaryCheckBox.Size = New System.Drawing.Size(152, 32)
        Me.SummaryCheckBox.TabIndex = 3
        Me.SummaryCheckBox.Text = "&Display summary"
        '
        'PlusPictureBox
        '
        Me.PlusPictureBox.Location = New System.Drawing.Point(24, 272)
        Me.PlusPictureBox.Name = "PlusPictureBox"
        Me.PlusPictureBox.Size = New System.Drawing.Size(16, 16)
        Me.PlusPictureBox.SizeMode = System.Windows.Forms.PictureBoxSizeMode.AutoSize
        Me.PlusPictureBox.TabIndex = 5
        Me.PlusPictureBox.TabStop = False
        Me.PlusPictureBox.Visible = False
        '
        'OperationGroupBox
        '
        Me.OperationGroupBox.Controls.Add(Me.AdditionRadioButton)
        Me.OperationGroupBox.Controls.Add(Me.SubtractionRadioButton)
        Me.OperationGroupBox.Font = New System.Drawing.Font("Tahoma", 12.0!, System.Drawing.FontStyle.Bold, System.Drawing.GraphicsUnit.Point, CType(0, Byte))
        Me.OperationGroupBox.Location = New System.Drawing.Point(200, 152)
        Me.OperationGroupBox.Name = "OperationGroupBox"
        Me.OperationGroupBox.Size = New System.Drawing.Size(120, 100)
        Me.OperationGroupBox.TabIndex = 2
        Me.OperationGroupBox.TabStop = False
        Me.OperationGroupBox.Text = "Operation"
        '
        'AdditionRadioButton
        '
        Me.AdditionRadioButton.Checked = True
        Me.AdditionRadioButton.Font = New System.Drawing.Font("Tahoma", 9.75!, System.Drawing.FontStyle.Bold, System.Drawing.GraphicsUnit.Point, CType(0, Byte))
        Me.AdditionRadioButton.Location = New System.Drawing.Point(8, 27)
        Me.AdditionRadioButton.Name = "AdditionRadioButton"
        Me.AdditionRadioButton.Size = New System.Drawing.Size(96, 24)
        Me.AdditionRadioButton.TabIndex = 0
        Me.AdditionRadioButton.TabStop = True
        Me.AdditionRadioButton.Text = "&Addition"
        '
        'SubtractionRadioButton
        '
        Me.SubtractionRadioButton.Font = New System.Drawing.Font("Tahoma", 9.75!, System.Drawing.FontStyle.Bold, System.Drawing.GraphicsUnit.Point, CType(0, Byte))
        Me.SubtractionRadioButton.Location = New System.Drawing.Point(8, 59)
        Me.SubtractionRadioButton.Name = "SubtractionRadioButton"
        Me.SubtractionRadioButton.TabIndex = 1
        Me.SubtractionRadioButton.Text = "&Subtraction"
        '
        'AnswerTextBox
        '
        Me.AnswerTextBox.AutoSize = False
        Me.AnswerTextBox.BackColor = System.Drawing.Color.FromArgb(CType(255, Byte), CType(255, Byte), CType(192, Byte))
        Me.AnswerTextBox.Font = New System.Drawing.Font("Tahoma", 14.25!, System.Drawing.FontStyle.Bold, System.Drawing.GraphicsUnit.Point, CType(0, Byte))
        Me.AnswerTextBox.Location = New System.Drawing.Point(203, 40)
        Me.AnswerTextBox.Name = "AnswerTextBox"
        Me.AnswerTextBox.Size = New System.Drawing.Size(61, 27)
        Me.AnswerTextBox.TabIndex = 0
        Me.AnswerTextBox.Text = ""
        Me.AnswerTextBox.TextAlign = System.Windows.Forms.HorizontalAlignment.Center
        '
        'SummaryGroupBox
        '
        Me.SummaryGroupBox.Controls.Add(Me.CorrectLabel)
        Me.SummaryGroupBox.Controls.Add(Me.IdCorrectLabel)
        Me.SummaryGroupBox.Controls.Add(Me.IdIncorrectLabel)
        Me.SummaryGroupBox.Controls.Add(Me.IncorrectLabel)
        Me.SummaryGroupBox.Location = New System.Drawing.Point(336, 168)
        Me.SummaryGroupBox.Name = "SummaryGroupBox"
        Me.SummaryGroupBox.Size = New System.Drawing.Size(160, 79)
        Me.SummaryGroupBox.TabIndex = 4
        Me.SummaryGroupBox.TabStop = False
        Me.SummaryGroupBox.Visible = False
        '
        'CorrectLabel
        '
        Me.CorrectLabel.BorderStyle = System.Windows.Forms.BorderStyle.FixedSingle
        Me.CorrectLabel.Font = New System.Drawing.Font("Tahoma", 9.75!, System.Drawing.FontStyle.Bold, System.Drawing.GraphicsUnit.Point, CType(0, Byte))
        Me.CorrectLabel.Location = New System.Drawing.Point(11, 40)
        Me.CorrectLabel.Name = "CorrectLabel"
        Me.CorrectLabel.Size = New System.Drawing.Size(48, 23)
        Me.CorrectLabel.TabIndex = 1
        Me.CorrectLabel.TextAlign = System.Drawing.ContentAlignment.MiddleCenter
        '
        'IdIncorrectLabel
        '
        Me.IdIncorrectLabel.AutoSize = True
        Me.IdIncorrectLabel.Font = New System.Drawing.Font("Tahoma", 9.75!, System.Drawing.FontStyle.Bold, System.Drawing.GraphicsUnit.Point, CType(0, Byte))
        Me.IdIncorrectLabel.Location = New System.Drawing.Point(72, 16)
        Me.IdIncorrectLabel.Name = "IdIncorrectLabel"
        Me.IdIncorrectLabel.Size = New System.Drawing.Size(72, 19)
        Me.IdIncorrectLabel.TabIndex = 2
        Me.IdIncorrectLabel.Text = "Incorrect:"
        '
        'IncorrectLabel
        '
        Me.IncorrectLabel.BorderStyle = System.Windows.Forms.BorderStyle.FixedSingle
        Me.IncorrectLabel.Font = New System.Drawing.Font("Tahoma", 9.75!, System.Drawing.FontStyle.Bold, System.Drawing.GraphicsUnit.Point, CType(0, Byte))
        Me.IncorrectLabel.Location = New System.Drawing.Point(75, 40)
        Me.IncorrectLabel.Name = "IncorrectLabel"
        Me.IncorrectLabel.Size = New System.Drawing.Size(48, 23)
        Me.IncorrectLabel.TabIndex = 3
        Me.IncorrectLabel.TextAlign = System.Drawing.ContentAlignment.MiddleCenter
        '
        'ProblemGroupBox
        '
        Me.ProblemGroupBox.Controls.Add(Me.Label1)
        Me.ProblemGroupBox.Controls.Add(Me.LblSymbol)
        Me.ProblemGroupBox.Controls.Add(Me.TbxNum2)
        Me.ProblemGroupBox.Controls.Add(Me.TbxNum1)
        Me.ProblemGroupBox.Controls.Add(Me.ExitButton)
        Me.ProblemGroupBox.Controls.Add(Me.AnswerTextBox)
        Me.ProblemGroupBox.Controls.Add(Me.CheckAnswerButton)
        Me.ProblemGroupBox.Location = New System.Drawing.Point(24, 24)
        Me.ProblemGroupBox.Name = "ProblemGroupBox"
        Me.ProblemGroupBox.Size = New System.Drawing.Size(472, 104)
        Me.ProblemGroupBox.TabIndex = 0
        Me.ProblemGroupBox.TabStop = False
        '
        'LblSymbol
        '
        Me.LblSymbol.Font = New System.Drawing.Font("Arial Black", 14.25!, System.Drawing.FontStyle.Bold, System.Drawing.GraphicsUnit.Point, CType(0, Byte))
        Me.LblSymbol.Location = New System.Drawing.Point(72, 40)
        Me.LblSymbol.Name = "LblSymbol"
        Me.LblSymbol.Size = New System.Drawing.Size(24, 23)
        Me.LblSymbol.TabIndex = 14
        Me.LblSymbol.Text = "+"
        Me.LblSymbol.TextAlign = System.Drawing.ContentAlignment.MiddleCenter
        '
        'TbxNum2
        '
        Me.TbxNum2.Font = New System.Drawing.Font("Tahoma", 12.0!, System.Drawing.FontStyle.Bold, System.Drawing.GraphicsUnit.Point, CType(0, Byte))
        Me.TbxNum2.Location = New System.Drawing.Point(99, 40)
        Me.TbxNum2.Name = "TbxNum2"
        Me.TbxNum2.Size = New System.Drawing.Size(48, 27)
        Me.TbxNum2.TabIndex = 13
        Me.TbxNum2.Text = ""
        Me.TbxNum2.TextAlign = System.Windows.Forms.HorizontalAlignment.Center
        '
        'TbxNum1
        '
        Me.TbxNum1.Font = New System.Drawing.Font("Tahoma", 12.0!, System.Drawing.FontStyle.Bold, System.Drawing.GraphicsUnit.Point, CType(0, Byte))
        Me.TbxNum1.Location = New System.Drawing.Point(19, 40)
        Me.TbxNum1.Name = "TbxNum1"
        Me.TbxNum1.Size = New System.Drawing.Size(48, 27)
        Me.TbxNum1.TabIndex = 12
        Me.TbxNum1.Text = ""
        Me.TbxNum1.TextAlign = System.Windows.Forms.HorizontalAlignment.Center
        '
        'ExitButton
        '
        Me.ExitButton.Font = New System.Drawing.Font("Tahoma", 9.75!, System.Drawing.FontStyle.Bold, System.Drawing.GraphicsUnit.Point, CType(0, Byte))
        Me.ExitButton.Location = New System.Drawing.Point(312, 64)
        Me.ExitButton.Name = "ExitButton"
        Me.ExitButton.Size = New System.Drawing.Size(128, 23)
        Me.ExitButton.TabIndex = 2
        Me.ExitButton.Text = "E&xit"
        '
        'CheckAnswerButton
        '
        Me.CheckAnswerButton.Font = New System.Drawing.Font("Tahoma", 9.75!, System.Drawing.FontStyle.Bold, System.Drawing.GraphicsUnit.Point, CType(0, Byte))
        Me.CheckAnswerButton.Location = New System.Drawing.Point(312, 24)
        Me.CheckAnswerButton.Name = "CheckAnswerButton"
        Me.CheckAnswerButton.Size = New System.Drawing.Size(128, 24)
        Me.CheckAnswerButton.TabIndex = 1
        Me.CheckAnswerButton.Text = "&Check Answer"
        '
        'GradeGroupBox
        '
        Me.GradeGroupBox.Controls.Add(Me.Grade1RadioButton)
        Me.GradeGroupBox.Controls.Add(Me.Grade2RadioButton)
        Me.GradeGroupBox.Font = New System.Drawing.Font("Tahoma", 12.0!, System.Drawing.FontStyle.Bold, System.Drawing.GraphicsUnit.Point, CType(0, Byte))
        Me.GradeGroupBox.Location = New System.Drawing.Point(24, 152)
        Me.GradeGroupBox.Name = "GradeGroupBox"
        Me.GradeGroupBox.Size = New System.Drawing.Size(160, 100)
        Me.GradeGroupBox.TabIndex = 1
        Me.GradeGroupBox.TabStop = False
        Me.GradeGroupBox.Text = "Grade"
        '
        'Grade1RadioButton
        '
        Me.Grade1RadioButton.Checked = True
        Me.Grade1RadioButton.Font = New System.Drawing.Font("Tahoma", 9.75!, System.Drawing.FontStyle.Bold, System.Drawing.GraphicsUnit.Point, CType(0, Byte))
        Me.Grade1RadioButton.Location = New System.Drawing.Point(8, 27)
        Me.Grade1RadioButton.Name = "Grade1RadioButton"
        Me.Grade1RadioButton.Size = New System.Drawing.Size(136, 24)
        Me.Grade1RadioButton.TabIndex = 0
        Me.Grade1RadioButton.TabStop = True
        Me.Grade1RadioButton.Text = "Grade &1 (1-10)"
        '
        'Grade2RadioButton
        '
        Me.Grade2RadioButton.Font = New System.Drawing.Font("Tahoma", 9.75!, System.Drawing.FontStyle.Bold, System.Drawing.GraphicsUnit.Point, CType(0, Byte))
        Me.Grade2RadioButton.Location = New System.Drawing.Point(8, 59)
        Me.Grade2RadioButton.Name = "Grade2RadioButton"
        Me.Grade2RadioButton.Size = New System.Drawing.Size(144, 24)
        Me.Grade2RadioButton.TabIndex = 1
        Me.Grade2RadioButton.Text = "Grade &2 (10-99)"
        '
        'MinusPictureBox
        '
        Me.MinusPictureBox.Location = New System.Drawing.Point(48, 272)
        Me.MinusPictureBox.Name = "MinusPictureBox"
        Me.MinusPictureBox.Size = New System.Drawing.Size(16, 16)
        Me.MinusPictureBox.SizeMode = System.Windows.Forms.PictureBoxSizeMode.AutoSize
        Me.MinusPictureBox.TabIndex = 5
        Me.MinusPictureBox.TabStop = False
        Me.MinusPictureBox.Visible = False
        '
        'NeutralPictureBox
        '
        Me.NeutralPictureBox.Location = New System.Drawing.Point(120, 264)
        Me.NeutralPictureBox.Name = "NeutralPictureBox"
        Me.NeutralPictureBox.Size = New System.Drawing.Size(32, 32)
        Me.NeutralPictureBox.SizeMode = System.Windows.Forms.PictureBoxSizeMode.StretchImage
        Me.NeutralPictureBox.TabIndex = 7
        Me.NeutralPictureBox.TabStop = False
        Me.NeutralPictureBox.Visible = False
        '
        'HappyPictureBox
        '
        Me.HappyPictureBox.Location = New System.Drawing.Point(80, 264)
        Me.HappyPictureBox.Name = "HappyPictureBox"
        Me.HappyPictureBox.Size = New System.Drawing.Size(32, 32)
        Me.HappyPictureBox.SizeMode = System.Windows.Forms.PictureBoxSizeMode.StretchImage
        Me.HappyPictureBox.TabIndex = 7
        Me.HappyPictureBox.TabStop = False
        Me.HappyPictureBox.Visible = False
        '
        'Label1
        '
        Me.Label1.Font = New System.Drawing.Font("Arial Black", 14.25!, System.Drawing.FontStyle.Bold, System.Drawing.GraphicsUnit.Point, CType(0, Byte))
        Me.Label1.Location = New System.Drawing.Point(168, 40)
        Me.Label1.Name = "Label1"
        Me.Label1.Size = New System.Drawing.Size(24, 23)
        Me.Label1.TabIndex = 15
        Me.Label1.Text = "="
        Me.Label1.TextAlign = System.Drawing.ContentAlignment.MiddleCenter
        '
        'MathForm
        '
        Me.AcceptButton = Me.CheckAnswerButton
        Me.AutoScaleBaseSize = New System.Drawing.Size(6, 16)
        Me.ClientSize = New System.Drawing.Size(520, 283)
        Me.Controls.Add(Me.OperationGroupBox)
        Me.Controls.Add(Me.NeutralPictureBox)
        Me.Controls.Add(Me.HappyPictureBox)
        Me.Controls.Add(Me.MinusPictureBox)
        Me.Controls.Add(Me.PlusPictureBox)
        Me.Controls.Add(Me.SummaryGroupBox)
        Me.Controls.Add(Me.GradeGroupBox)
        Me.Controls.Add(Me.ProblemGroupBox)
        Me.Controls.Add(Me.SummaryCheckBox)
        Me.Font = New System.Drawing.Font("Tahoma", 9.75!, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, CType(0, Byte))
        Me.FormBorderStyle = System.Windows.Forms.FormBorderStyle.Fixed3D
        Me.MaximizeBox = False
        Me.Name = "MathForm"
        Me.ShowInTaskbar = False
        Me.StartPosition = System.Windows.Forms.FormStartPosition.CenterScreen
        Me.Text = "Math Practice"
        Me.OperationGroupBox.ResumeLayout(False)
        Me.SummaryGroupBox.ResumeLayout(False)
        Me.ProblemGroupBox.ResumeLayout(False)
        Me.GradeGroupBox.ResumeLayout(False)
        Me.ResumeLayout(False)

    End Sub

#End Region


    Private Sub ExitButton_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles ExitButton.Click
        Me.Close()
    End Sub


    Private Sub CheckAnswerButton_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles CheckAnswerButton.Click
        '     Event Click on the CheckAnswer Button
        'If the Answer is correct show proper Message and clear the TextBox
        'If Incorrect show proper Message and allow user to retry

        Dim a, b, c As Integer                  'Will use for the Numbers and the Answer 
        Static correct, incorrect As Integer    'Counters for the Summary 
        a = Me.TbxNum1.Text
        b = Me.TbxNum2.Text
        c = Me.AnswerTextBox.Text
        If Me.SubtractionRadioButton.Checked = True Then 'Check if it's a substraction or adition  
            If a - b = c Then   'Check if it's correct the Substraction 
                MsgBox(" You are  Correct", MsgBoxStyle.Exclamation, "  Congratulations ")
                correct += 1    'Increment Correct Counter
                Me.TbxNum1.Text = ""
                Me.TbxNum2.Text = ""
                Me.AnswerTextBox.Text = ""
            Else
                MsgBox(" Sorry You are  NOT Correct", MsgBoxStyle.Critical, " Try Again ...")
                Me.AnswerTextBox.SelectAll()
                incorrect += 1  'Increment Incorrect Counter
            End If

        Else          ' Not a Substraction then it's an Addition
            If a + b = c Then   'Check if it's correct the Addition
                MsgBox(" You are  Correct", MsgBoxStyle.Exclamation, "  Congratulations ")
                correct += 1    'Increment Correct Counter
                Me.TbxNum1.Text = ""
                Me.TbxNum2.Text = ""
                Me.AnswerTextBox.Text = ""
            Else
                MsgBox(" Sorry You are  NOT Correct", MsgBoxStyle.Critical, " Try Again ...")
                Me.AnswerTextBox.SelectAll()
                incorrect += 1  'Increment Incorrect Counter
            End If
        End If
        Me.IncorrectLabel.Text = incorrect
        Me.CorrectLabel.Text = correct
    End Sub

    Private Sub SummaryCheckBox_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles SummaryCheckBox.Click
        '     Event Click on the Summary CheckBox
        'If it's checked show Summary
        'NOT checked do NOT show Summary
        If Me.SummaryCheckBox.Checked = True Then
            Me.SummaryGroupBox.Visible = True
        Else
            Me.SummaryGroupBox.Visible = False
        End If
    End Sub

    Private Sub SubtractionRadioButton_CheckedChanged(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles SubtractionRadioButton.CheckedChanged
        Me.LblSymbol.Text = "-"
    End Sub

    Private Sub AdditionRadioButton_CheckedChanged(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles AdditionRadioButton.CheckedChanged
        Me.LblSymbol.Text = "+"
    End Sub


    Private Sub AnswerTextBox_KeyPress(ByVal sender As Object, ByVal e As System.Windows.Forms.KeyPressEventArgs) Handles AnswerTextBox.KeyPress, TbxNum1.KeyPress, TbxNum2.KeyPress
        'Allow only Numbers and Backspace in the textboxes
        If (e.KeyChar < "0" OrElse e.KeyChar > "9") AndAlso e.KeyChar <> ControlChars.Back Then
            e.Handled = True
        End If
    End Sub
End Class