Public Sub InstantiateMyNumericUpDown()
    ' Create and initialize a NumericUpDown control.
    numericUpDown1 = New NumericUpDown()
    
    ' Dock the control to the top of the form.
    numericUpDown1.Dock = System.Windows.Forms.DockStyle.Top
    
    ' Set the Minimum, Maximum, and initial Value.
    numericUpDown1.Value = 5
    numericUpDown1.Maximum = 2500
    numericUpDown1.Minimum = - 100
    
    ' Add the NumericUpDown to the Form.
    Controls.Add(numericUpDown1)
End Sub    

' Check box to toggle decimal places to be displayed.
Private Sub checkBox1_Click(sender As Object, e As EventArgs)
    ' If DecimalPlaces is greater than 0, set them to 0 and round the
    ' current Value; otherwise, set DecimalPlaces to 2 and change the
    ' Increment to 0.25. 
    If numericUpDown1.DecimalPlaces > 0 Then
        numericUpDown1.DecimalPlaces = 0
        numericUpDown1.Value = Decimal.Round(numericUpDown1.Value, 0)
    Else
        numericUpDown1.DecimalPlaces = 2
        numericUpDown1.Increment = 0.25D
    End If
End Sub    

' Check box to toggle thousands separators to be displayed.
Private Sub checkBox2_Click(sender As Object, e As EventArgs)
    ' If ThousandsSeparator is true, set it to false;
    ' otherwise, set it to true. 
    If numericUpDown1.ThousandsSeparator Then
        numericUpDown1.ThousandsSeparator = False
    Else
        numericUpDown1.ThousandsSeparator = True
    End If
End Sub    

' Check box to toggle hexadecimal to be displayed.
Private Sub checkBox3_Click(sender As Object, e As EventArgs)
    ' If Hexadecimal is true, set it to false;
    ' otherwise, set it to true. 
    If numericUpDown1.Hexadecimal Then
        numericUpDown1.Hexadecimal = False
    Else
        numericUpDown1.Hexadecimal = True
    End If
End Sub

' 导入命名空间
Imports System.Windows.Forms

public class GetValueFromNumericUpDown
   public Shared Sub Main
        Application.Run(New FrmInterestCalculator)
   End Sub
End class

Public Class FrmInterestCalculator

   Private Sub btnCalculate_Click(ByVal sender As System.Object, _
      ByVal e As System.EventArgs) Handles btnCalculate.Click
      
      Console.WriteLine(Convert.ToInt32(updYear.Value))

   End Sub
End Class

<Global.Microsoft.VisualBasic.CompilerServices.DesignerGenerated()> _
Partial Class FrmInterestCalculator
   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.btnCalculate = New System.Windows.Forms.Button
      Me.txtDisplay = New System.Windows.Forms.TextBox
      Me.lblBalance = New System.Windows.Forms.Label
      Me.updYear = New System.Windows.Forms.NumericUpDown
      Me.lblYears = New System.Windows.Forms.Label
      Me.txtInterest = New System.Windows.Forms.TextBox
      Me.lblInterest = New System.Windows.Forms.Label
      Me.txtPrincipal = New System.Windows.Forms.TextBox
      Me.lblPrincipal = New System.Windows.Forms.Label
      CType(Me.updYear, System.ComponentModel.ISupportInitialize).BeginInit()
      Me.SuspendLayout()
      '
      'btnCalculate
      '
      Me.btnCalculate.Location = New System.Drawing.Point(197, 14)
      Me.btnCalculate.Name = "btnCalculate"
      Me.btnCalculate.Size = New System.Drawing.Size(75, 23)
      Me.btnCalculate.TabIndex = 17
      Me.btnCalculate.Text = "Calculate"
      '
      'txtDisplay
      '
      Me.txtDisplay.BackColor = System.Drawing.SystemColors.Control
      Me.txtDisplay.Location = New System.Drawing.Point(18, 170)
      Me.txtDisplay.Multiline = True
      Me.txtDisplay.Name = "txtDisplay"
      Me.txtDisplay.ReadOnly = True
      Me.txtDisplay.ScrollBars = System.Windows.Forms.ScrollBars.Vertical
      Me.txtDisplay.Size = New System.Drawing.Size(254, 104)
      Me.txtDisplay.TabIndex = 16
      '
      'lblBalance
      '
      Me.lblBalance.AutoSize = True
      Me.lblBalance.Location = New System.Drawing.Point(17, 143)
      Me.lblBalance.Name = "lblBalance"
      Me.lblBalance.Size = New System.Drawing.Size(122, 13)
      Me.lblBalance.TabIndex = 15
      Me.lblBalance.Text = "Yearly account balance:"
      '
      'updYear
      '
      Me.updYear.Location = New System.Drawing.Point(85, 95)
      Me.updYear.Maximum = New Decimal(New Integer() {10, 0, 0, 0})
      Me.updYear.Minimum = New Decimal(New Integer() {1, 0, 0, 0})
      Me.updYear.Name = "updYear"
      Me.updYear.ReadOnly = True
      Me.updYear.Size = New System.Drawing.Size(100, 20)
      Me.updYear.TabIndex = 14
      Me.updYear.TextAlign = System.Windows.Forms.HorizontalAlignment.Right
      Me.updYear.Value = New Decimal(New Integer() {1, 0, 0, 0})
      '
      'lblYears
      '
      Me.lblYears.AutoSize = True
      Me.lblYears.Location = New System.Drawing.Point(17, 102)
      Me.lblYears.Name = "lblYears"
      Me.lblYears.Size = New System.Drawing.Size(37, 13)
      Me.lblYears.TabIndex = 13
      Me.lblYears.Text = "Years:"
      '
      'txtInterest
      '
      Me.txtInterest.Location = New System.Drawing.Point(85, 58)
      Me.txtInterest.Name = "txtInterest"
      Me.txtInterest.Size = New System.Drawing.Size(100, 20)
      Me.txtInterest.TabIndex = 12
      Me.txtInterest.TextAlign = System.Windows.Forms.HorizontalAlignment.Right
      '
      'lblInterest
      '
      Me.lblInterest.AutoSize = True
      Me.lblInterest.Location = New System.Drawing.Point(17, 61)
      Me.lblInterest.Name = "lblInterest"
      Me.lblInterest.Size = New System.Drawing.Size(71, 13)
      Me.lblInterest.TabIndex = 11
      Me.lblInterest.Text = "Interest Rate:"
      '
      'txtPrincipal
      '
      Me.txtPrincipal.Location = New System.Drawing.Point(85, 17)
      Me.txtPrincipal.Name = "txtPrincipal"
      Me.txtPrincipal.Size = New System.Drawing.Size(100, 20)
      Me.txtPrincipal.TabIndex = 10
      Me.txtPrincipal.TextAlign = System.Windows.Forms.HorizontalAlignment.Right
      '
      'lblPrincipal
      '
      Me.lblPrincipal.AutoSize = True
      Me.lblPrincipal.Location = New System.Drawing.Point(17, 20)
      Me.lblPrincipal.Name = "lblPrincipal"
      Me.lblPrincipal.Size = New System.Drawing.Size(50, 13)
      Me.lblPrincipal.TabIndex = 9
      Me.lblPrincipal.Text = "Principal:"
      '
      'FrmInterestCalculator
      '
      Me.AutoScaleDimensions = New System.Drawing.SizeF(6.0!, 13.0!)
      Me.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font
      Me.ClientSize = New System.Drawing.Size(289, 288)
      Me.Controls.Add(Me.btnCalculate)
      Me.Controls.Add(Me.txtDisplay)
      Me.Controls.Add(Me.lblBalance)
      Me.Controls.Add(Me.updYear)
      Me.Controls.Add(Me.lblYears)
      Me.Controls.Add(Me.txtInterest)
      Me.Controls.Add(Me.lblInterest)
      Me.Controls.Add(Me.txtPrincipal)
      Me.Controls.Add(Me.lblPrincipal)
      Me.Name = "FrmInterestCalculator"
      Me.Text = "Interest Calculator"
      CType(Me.updYear, System.ComponentModel.ISupportInitialize).EndInit()
      Me.ResumeLayout(False)
      Me.PerformLayout()

   End Sub
   Friend WithEvents btnCalculate As System.Windows.Forms.Button
   Friend WithEvents txtDisplay As System.Windows.Forms.TextBox
   Friend WithEvents lblBalance As System.Windows.Forms.Label
   Friend WithEvents updYear As System.Windows.Forms.NumericUpDown
   Friend WithEvents lblYears As System.Windows.Forms.Label
   Friend WithEvents txtInterest As System.Windows.Forms.TextBox
   Friend WithEvents lblInterest As System.Windows.Forms.Label
   Friend WithEvents txtPrincipal As System.Windows.Forms.TextBox
   Friend WithEvents lblPrincipal As System.Windows.Forms.Label

End Class