Long Operation with Timer and Wait Cursor

Imports System
Imports System.Runtime.InteropServices
Imports System.Drawing
Imports System.ComponentModel
Imports System.Windows.Forms
Imports System.IO

Public Class MainClass
    
    Shared Sub Main(ByVal args As String())
        Dim myform As New Form1()
        Application.Run(myform)            

    End Sub

End Class

Public Class Form1
    Private Sub btnGo_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnGo.Click
        Me.Cursor = Cursors.WaitCursor
        tmrLongTask.Enabled = True
        btnGo.Enabled = False

        ' refresh everything.
        Application.DoEvents()
    End Sub

    Private Sub tmrLongTask_Tick(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles tmrLongTask.Tick
        tmrLongTask.Enabled = False
        Me.Cursor = Cursors.Default
        btnGo.Enabled = True
    End Sub
End Class


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

    'Form overrides dispose to clean up the component list.
    <System.Diagnostics.DebuggerNonUserCode()> _
    Protected Overloads 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.btnGo = New System.Windows.Forms.Button
        Me.tmrLongTask = New System.Windows.Forms.Timer(Me.components)
        Me.SuspendLayout()
        '
        'btnGo
        '
        Me.btnGo.Location = New System.Drawing.Point(16, 16)
        Me.btnGo.Name = "btnGo"
        Me.btnGo.Size = New System.Drawing.Size(180, 23)
        Me.btnGo.TabIndex = 0
        Me.btnGo.Text = "Start Waiting for 3 Seconds"
        '
        'tmrLongTask
        '
        Me.tmrLongTask.Interval = 3000
        '
        'Form1
        '
        Me.AutoScaleDimensions = New System.Drawing.SizeF(6.0!, 13.0!)
        Me.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font
        Me.ClientSize = New System.Drawing.Size(292, 273)
        Me.Controls.Add(Me.btnGo)
        Me.Name = "Form1"
        Me.Text = "UseWaitCursor"
        Me.ResumeLayout(False)

    End Sub
    Friend WithEvents btnGo As System.Windows.Forms.Button
    Friend WithEvents tmrLongTask As System.Windows.Forms.Timer

End Class
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