VB.Net Tutorial/GUI/TrackBar

Get TrackBar value and LargeChange value

imports System
imports System.Drawing
imports System.Windows.Forms
public class TrackBars : inherits Form
  dim htbar as TrackBar
  dim vtbar as TrackBar
  public sub New()
    Size = new Size(500,520)
    htbar = new TrackBar()
    htbar.Parent = me
    htbar.Orientation = Orientation.Horizontal
    htbar.Size = new Size(200, 10)
    htbar.Location = new Point(0, 25)
    htbar.TickStyle = TickStyle.BottomRight
    htbar.TickFrequency = 25
    htbar.Minimum = 25
    htbar.Maximum = 400
    htbar.SmallChange = 10
    htbar.LargeChange = 25
    htbar.BackColor = Color.Yellow
    htbar.Value = 100
    AddHandler htbar.ValueChanged, AddressOf htbar_OnValueChanged
    vtbar = new TrackBar()
    vtbar.Parent = me
    vtbar.Orientation = Orientation.Vertical
    vtbar.Size = new Size(25, 300)
    vtbar.Location = new Point(25, 25)
    vtbar.TickStyle = TickStyle.BottomRight
    vtbar.SetRange(25,400)
    vtbar.SmallChange = 10
    vtbar.LargeChange = 50
    vtbar.TickFrequency = CInt(vtbar.Maximum / 20)
    vtbar.BackColor = Color.Pink
    vtbar.Value = 200
    AddHandler vtbar.ValueChanged, AddressOf vtbar_OnValueChanged
  end sub  "  close for constructor
  private sub htbar_OnValueChanged(ByVal sender as object, _
              ByVal e as EventArgs)
    Console.WriteLine(htbar.Value)
  end sub
  private sub vtbar_OnValueChanged(ByVal sender as object, _
              ByVal e as EventArgs)
    Console.WriteLine(vtbar.Value)
    Console.WriteLine(vtbar.LargeChange)
  end sub
  public shared sub Main() 
    Application.Run(new TrackBars())
  end sub
end class

Link ProgressBar with a TrackBar

Imports System.Windows.Forms
public class TrackBarProgressBarLink
   public Shared Sub Main
        Application.Run(New Form1)
   End Sub
End class

Public Class Form1
    Private Sub TrackBar1_Scroll(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles TrackBar1.Scroll
        ProgressBar1.Value = TrackBar1.Value
        Label1.Text = ProgressBar1.Value.ToString + "/100"
    End Sub
End Class
<Global.Microsoft.VisualBasic.rupilerServices.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.ruponentModel.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.ProgressBar1 = New System.Windows.Forms.ProgressBar
        Me.Label1 = New System.Windows.Forms.Label
        Me.TrackBar1 = New System.Windows.Forms.TrackBar
        CType(Me.TrackBar1, System.ruponentModel.ISupportInitialize).BeginInit()
        Me.SuspendLayout()
        "
        "ProgressBar1
        "
        Me.ProgressBar1.Location = New System.Drawing.Point(12, 50)
        Me.ProgressBar1.Name = "ProgressBar1"
        Me.ProgressBar1.Size = New System.Drawing.Size(358, 34)
        Me.ProgressBar1.TabIndex = 0
        "
        "Label1
        "
        Me.Label1.AutoSize = True
        Me.Label1.Location = New System.Drawing.Point(160, 23)
        Me.Label1.Name = "Label1"
        Me.Label1.Size = New System.Drawing.Size(35, 12)
        Me.Label1.TabIndex = 1
        Me.Label1.Text = "0/100"
        "
        "TrackBar1
        "
        Me.TrackBar1.Location = New System.Drawing.Point(12, 110)
        Me.TrackBar1.Maximum = 100
        Me.TrackBar1.Name = "TrackBar1"
        Me.TrackBar1.Size = New System.Drawing.Size(358, 45)
        Me.TrackBar1.TabIndex = 2
        "
        "Form1
        "
        Me.AutoScaleDimensions = New System.Drawing.SizeF(6.0!, 12.0!)
        Me.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font
        Me.ClientSize = New System.Drawing.Size(382, 166)
        Me.Controls.Add(Me.TrackBar1)
        Me.Controls.Add(Me.Label1)
        Me.Controls.Add(Me.ProgressBar1)
        Me.Name = "Form1"
        Me.Text = "Form1"
        CType(Me.TrackBar1, System.ruponentModel.ISupportInitialize).EndInit()
        Me.ResumeLayout(False)
        Me.PerformLayout()
    End Sub
    Friend WithEvents ProgressBar1 As System.Windows.Forms.ProgressBar
    Friend WithEvents Label1 As System.Windows.Forms.Label
    Friend WithEvents TrackBar1 As System.Windows.Forms.TrackBar
End Class

Use TrackBar to control the Scale

Imports System.Drawing
Imports System.Drawing.Drawing2D
Imports System.Windows.Forms
public class TrackBarScale
   public Shared Sub Main
        Application.Run(New Form1)
   End Sub
End class
Public Class Form1
    Private Sub TrackBar1_Scroll(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles DisplayScale.Scroll
        DrawingArea.Invalidate()
    End Sub
    Private Sub DrawingArea_Paint(ByVal sender As Object, ByVal e As System.Windows.Forms.PaintEventArgs) Handles DrawingArea.Paint
        Dim titleFont As Font
        Dim mainFont As Font
        Dim titleArea As Rectangle
        Dim textArea As Rectangle
        Dim titleFormat As StringFormat
        Const MainTitle As String = "www.vbex.ru"
        titleFont = New Font("Arial", 16, FontStyle.Bold)
        mainFont = New Font("Arial", 12, FontStyle.Regular)
        titleArea = New Rectangle(0, 0, DrawingArea.ClientRectangle.Width, titleFont.Height)
        textArea = New Rectangle(0, titleFont.Height * 1.4, DrawingArea.ClientRectangle.Width, DrawingArea.ClientRectangle.Height - (titleFont.Height * 1.4))
        e.Graphics.ScaleTransform(DisplayScale.Value, DisplayScale.Value)
        titleFormat = New StringFormat()
        titleFormat.Alignment = StringAlignment.Center
        e.Graphics.DrawString(MainTitle, titleFont, Brushes.Black, titleArea, titleFormat)
        titleFormat.Dispose()
        mainFont.Dispose()
        titleFont.Dispose()
    End Sub
End Class

<Global.Microsoft.VisualBasic.rupilerServices.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.ruponentModel.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.LabelText = New System.Windows.Forms.Label
        Me.DisplayText = New System.Windows.Forms.TextBox
        Me.LabelScale = New System.Windows.Forms.Label
        Me.DisplayScale = New System.Windows.Forms.TrackBar
        Me.ActDisplay = New System.Windows.Forms.Button
        Me.DrawingArea = New System.Windows.Forms.PictureBox
        CType(Me.DisplayScale, System.ruponentModel.ISupportInitialize).BeginInit()
        CType(Me.DrawingArea, System.ruponentModel.ISupportInitialize).BeginInit()
        Me.SuspendLayout()
        "
        "LabelText
        "
        Me.LabelText.AutoSize = True
        Me.LabelText.Location = New System.Drawing.Point(8, 8)
        Me.LabelText.Name = "LabelText"
        Me.LabelText.Size = New System.Drawing.Size(31, 13)
        Me.LabelText.TabIndex = 0
        Me.LabelText.Text = "&Text:"
        "
        "LabelScale
        "
        Me.LabelScale.AutoSize = True
        Me.LabelScale.Location = New System.Drawing.Point(8, 144)
        Me.LabelScale.Name = "LabelScale"
        Me.LabelScale.Size = New System.Drawing.Size(37, 13)
        Me.LabelScale.TabIndex = 2
        Me.LabelScale.Text = "&Scale:"
        "
        "DisplayScale
        "
        Me.DisplayScale.Location = New System.Drawing.Point(48, 136)
        Me.DisplayScale.Maximum = 5
        Me.DisplayScale.Minimum = 1
        Me.DisplayScale.Name = "DisplayScale"
        Me.DisplayScale.Size = New System.Drawing.Size(104, 45)
        Me.DisplayScale.TabIndex = 3
        Me.DisplayScale.Value = 1
        "
        "DrawingArea
        "
        Me.DrawingArea.BackColor = System.Drawing.Color.White
        Me.DrawingArea.BorderStyle = System.Windows.Forms.BorderStyle.Fixed3D
        Me.DrawingArea.Location = New System.Drawing.Point(192, 8)
        Me.DrawingArea.Name = "DrawingArea"
        Me.DrawingArea.Size = New System.Drawing.Size(328, 208)
        Me.DrawingArea.TabIndex = 5
        Me.DrawingArea.TabStop = False
        "
        "Form1
        "
        Me.AutoScaleDimensions = New System.Drawing.SizeF(6.0!, 13.0!)
        Me.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font
        Me.ClientSize = New System.Drawing.Size(532, 227)
        Me.Controls.Add(Me.DrawingArea)
        Me.Controls.Add(Me.DisplayScale)

        Me.FormBorderStyle = System.Windows.Forms.FormBorderStyle.FixedSingle
        Me.MaximizeBox = False
        Me.Name = "Form1"
        Me.Text = "Displaying Scaled Content"
        CType(Me.DisplayScale, System.ruponentModel.ISupportInitialize).EndInit()
        CType(Me.DrawingArea, System.ruponentModel.ISupportInitialize).EndInit()
        Me.ResumeLayout(False)
        Me.PerformLayout()
    End Sub
    Friend WithEvents LabelText As System.Windows.Forms.Label
    Friend WithEvents DisplayText As System.Windows.Forms.TextBox
    Friend WithEvents LabelScale As System.Windows.Forms.Label
    Friend WithEvents DisplayScale As System.Windows.Forms.TrackBar
    Friend WithEvents ActDisplay As System.Windows.Forms.Button
    Friend WithEvents DrawingArea As System.Windows.Forms.PictureBox
End Class