VB.Net by API/System.Windows.Forms/Panel

Panel.AutoScroll

<source lang="vbnet"> Imports System Imports System.Drawing Imports System.Windows.Forms Imports System.ruponentModel Imports System.Drawing.Drawing2D Imports System.IO Public Class MainClass

   Shared Sub Main()
       Dim form1 As Form = New Form1
       Application.Run(form1)

   End Sub

End Class

Public Class Form1

   Inherits System.Windows.Forms.Form

1. 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
   "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.
   Friend WithEvents Panel1 As System.Windows.Forms.Panel
   Friend WithEvents Button6 As System.Windows.Forms.Button
   Friend WithEvents Button5 As System.Windows.Forms.Button
   Friend WithEvents Button4 As System.Windows.Forms.Button
   Friend WithEvents Button3 As System.Windows.Forms.Button
   Friend WithEvents Button2 As System.Windows.Forms.Button
   Friend WithEvents Button1 As System.Windows.Forms.Button
   <System.Diagnostics.DebuggerStepThrough()> Private Sub InitializeComponent()
       Me.Panel1 = New System.Windows.Forms.Panel()
       Me.Button6 = New System.Windows.Forms.Button()
       Me.Button5 = New System.Windows.Forms.Button()
       Me.Button4 = New System.Windows.Forms.Button()
       Me.Button3 = New System.Windows.Forms.Button()
       Me.Button2 = New System.Windows.Forms.Button()
       Me.Button1 = New System.Windows.Forms.Button()
       Me.Panel1.SuspendLayout()
       Me.SuspendLayout()
       "
       "Panel1
       "
       Me.Panel1.Anchor = (((System.Windows.Forms.AnchorStyles.Top Or System.Windows.Forms.AnchorStyles.Bottom) _
                   Or System.Windows.Forms.AnchorStyles.Left) _
                   Or System.Windows.Forms.AnchorStyles.Right)
       Me.Panel1.AutoScroll = True
       Me.Panel1.BorderStyle = System.Windows.Forms.BorderStyle.Fixed3D
       Me.Panel1.Controls.AddRange(New System.Windows.Forms.Control() {Me.Button6, Me.Button5, Me.Button4, Me.Button3, Me.Button2, Me.Button1})
       Me.Panel1.Location = New System.Drawing.Point(8, 8)
       Me.Panel1.Name = "Panel1"
       Me.Panel1.Size = New System.Drawing.Size(284, 172)
       Me.Panel1.TabIndex = 1
       "
       "Button6
       "
       Me.Button6.FlatStyle = System.Windows.Forms.FlatStyle.System
       Me.Button6.Location = New System.Drawing.Point(16, 180)
       Me.Button6.Name = "Button6"
       Me.Button6.Size = New System.Drawing.Size(168, 24)
       Me.Button6.TabIndex = 5
       Me.Button6.Text = "Button6"
       "
       "Button5
       "
       Me.Button5.FlatStyle = System.Windows.Forms.FlatStyle.System
       Me.Button5.Location = New System.Drawing.Point(16, 148)
       Me.Button5.Name = "Button5"
       Me.Button5.Size = New System.Drawing.Size(168, 24)
       Me.Button5.TabIndex = 4
       Me.Button5.Text = "Button5"
       "
       "Button4
       "
       Me.Button4.FlatStyle = System.Windows.Forms.FlatStyle.System
       Me.Button4.Location = New System.Drawing.Point(16, 116)
       Me.Button4.Name = "Button4"
       Me.Button4.Size = New System.Drawing.Size(168, 24)
       Me.Button4.TabIndex = 3
       Me.Button4.Text = "Button4"
       "
       "Button3
       "
       Me.Button3.FlatStyle = System.Windows.Forms.FlatStyle.System
       Me.Button3.Location = New System.Drawing.Point(16, 84)
       Me.Button3.Name = "Button3"
       Me.Button3.Size = New System.Drawing.Size(168, 24)
       Me.Button3.TabIndex = 2
       Me.Button3.Text = "Button3"
       "
       "Button2
       "
       Me.Button2.FlatStyle = System.Windows.Forms.FlatStyle.System
       Me.Button2.Location = New System.Drawing.Point(16, 52)
       Me.Button2.Name = "Button2"
       Me.Button2.Size = New System.Drawing.Size(168, 24)
       Me.Button2.TabIndex = 1
       Me.Button2.Text = "Button2"
       "
       "Button1
       "
       Me.Button1.FlatStyle = System.Windows.Forms.FlatStyle.System
       Me.Button1.Location = New System.Drawing.Point(16, 20)
       Me.Button1.Name = "Button1"
       Me.Button1.Size = New System.Drawing.Size(168, 24)
       Me.Button1.TabIndex = 0
       Me.Button1.Text = "Button1"
       "
       "ScrollablePanel
       "
       Me.AutoScaleBaseSize = New System.Drawing.Size(5, 14)
       Me.ClientSize = New System.Drawing.Size(300, 186)
       Me.Controls.AddRange(New System.Windows.Forms.Control() {Me.Panel1})
       Me.Font = New System.Drawing.Font("Tahoma", 8.25!, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, CType(0, Byte))
       Me.Name = "ScrollablePanel"
       Me.Text = "Scrollable Panel"
       Me.Panel1.ResumeLayout(False)
       Me.ResumeLayout(False)
   End Sub

1. End Region

End Class

 </source>

Panel.BorderStyle

<source lang="vbnet"> Imports System.Drawing Imports System.Drawing.Drawing2D Imports System.Windows.Forms public class PanelInAction

  public Shared Sub Main
       Application.Run(New Form1)
  End Sub

End class Public Class Form1

   Inherits System.Windows.Forms.Form
   Friend WithEvents TextBox1 As System.Windows.Forms.TextBox
   Friend WithEvents Label1 As System.Windows.Forms.Label

   Dim Panel1 As New Panel
   Dim Panel2 As New Panel
   Dim WithEvents RadioButton1 As New RadioButton
   Dim WithEvents RadioButton2 As New RadioButton
   Dim WithEvents RadioButton3 As New RadioButton
   Dim WithEvents RadioButton4 As New RadioButton
   Dim WithEvents RadioButton5 As New RadioButton
   Dim WithEvents RadioButton6 As New RadioButton
   Public Sub New()
       MyBase.New()
       Me.TextBox1 = New System.Windows.Forms.TextBox
       Me.Label1 = New System.Windows.Forms.Label
       Me.SuspendLayout()
       Me.TextBox1.Location = New System.Drawing.Point(8, 200)
       Me.TextBox1.Name = "TextBox1"
       Me.TextBox1.Size = New System.Drawing.Size(272, 20)
       Me.TextBox1.TabIndex = 0
       Me.TextBox1.Text = ""
       Me.AutoScaleBaseSize = New System.Drawing.Size(5, 13)
       Me.ClientSize = New System.Drawing.Size(292, 273)
       Me.Controls.Add(Me.Label1)
       Me.Controls.Add(Me.TextBox1)
       Me.Name = "Form1"
       Me.Text = "Form1"
       Me.ResumeLayout(False)

       Panel1.Location = New Point(20, 60)
       Panel1.Size = New Size(110, 100)
       Panel1.BorderStyle = BorderStyle.FixedSingle
       Panel2.Location = New Point(140, 60)
       Panel2.Size = New Size(110, 100)
       Panel2.BorderStyle = BorderStyle.FixedSingle
       RadioButton1.Location = New Point(6, 16)
       RadioButton1.Text = "Radio Button 1"
       RadioButton1.Size = New Size(120, 16)
       RadioButton2.Location = New Point(6, 36)
       RadioButton2.Text = "Radio Button 2"
       RadioButton2.Size = New Size(120, 20)
       RadioButton3.Location = New Point(6, 56)
       RadioButton3.Text = "Radio Button 3"
       RadioButton3.Size = New Size(120, 20)
       RadioButton4.Location = New Point(6, 16)
       RadioButton4.Text = "Radio Button 4"
       RadioButton4.Size = New Size(120, 16)
       RadioButton5.Location = New Point(6, 36)
       RadioButton5.Text = "Radio Button 5"
       RadioButton5.Size = New Size(120, 20)
       RadioButton6.Location = New Point(6, 56)
       RadioButton6.Text = "Radio Button 6"
       RadioButton6.Size = New Size(120, 20)
       Panel1.Controls.Add(RadioButton1)
       Panel1.Controls.Add(RadioButton2)
       Panel1.Controls.Add(RadioButton3)
       Panel2.Controls.Add(RadioButton4)
       Panel2.Controls.Add(RadioButton5)
       Panel2.Controls.Add(RadioButton6)
       Controls.Add(Panel1)
       Controls.Add(Panel2)
       AddHandler RadioButton1.CheckedChanged, AddressOf _
           RadioButton1_CheckedChanged
       AddHandler RadioButton2.CheckedChanged, AddressOf _
           RadioButton2_CheckedChanged
       AddHandler RadioButton3.CheckedChanged, AddressOf _
           RadioButton3_CheckedChanged
       AddHandler RadioButton4.CheckedChanged, AddressOf _
           RadioButton4_CheckedChanged
       AddHandler RadioButton5.CheckedChanged, AddressOf _
           RadioButton5_CheckedChanged
       AddHandler RadioButton6.CheckedChanged, AddressOf _
           RadioButton6_CheckedChanged
   End Sub
   Private Sub RadioButton1_CheckedChanged(ByVal sender As _
       System.Object, ByVal e As System.EventArgs) 
       TextBox1.Text = "You clicked radio button 1"
   End Sub
   Private Sub RadioButton2_CheckedChanged(ByVal sender As _
       System.Object, ByVal e As System.EventArgs) 
       TextBox1.Text = "You clicked radio button 2"
   End Sub
   Private Sub RadioButton3_CheckedChanged(ByVal sender As _
       System.Object, ByVal e As System.EventArgs) 
       TextBox1.Text = "You clicked radio button 3"
   End Sub
   Private Sub RadioButton4_CheckedChanged(ByVal sender As _
       System.Object, ByVal e As System.EventArgs) 
       TextBox1.Text = "You clicked radio button 4"
   End Sub
   Private Sub RadioButton5_CheckedChanged(ByVal sender As _
       System.Object, ByVal e As System.EventArgs) 
       TextBox1.Text = "You clicked radio button 5"
   End Sub
   Private Sub RadioButton6_CheckedChanged(ByVal sender As _
       System.Object, ByVal e As System.EventArgs) 
       TextBox1.Text = "You clicked radio button 6"
   End Sub

End Class

 </source>

Panel.Controls.Add

<source lang="vbnet">

Imports System Imports System.Data Imports System.Windows.Forms Imports System.Drawing Imports System.Drawing.Printing Public Class MainClass

   Shared Sub Main()
      Dim form1 As Form = New Form1
      Application.Run(form1)    
   End Sub

End Class

Public Class Form1

   Private Sub btnScroll_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnScroll.Click
       Panel1.AutoScrollPosition = New Point(Integer.Parse(txtX.Text), Integer.Parse(txtY.Text))
   End Sub

End Class

<Global.Microsoft.VisualBasic.rupilerServices.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.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.Panel1 = New System.Windows.Forms.Panel
       Me.Label1 = New System.Windows.Forms.Label
       Me.Label2 = New System.Windows.Forms.Label
       Me.Label3 = New System.Windows.Forms.Label
       Me.txtX = New System.Windows.Forms.TextBox
       Me.txtY = New System.Windows.Forms.TextBox
       Me.btnScroll = New System.Windows.Forms.Button
       Me.Label4 = New System.Windows.Forms.Label
       Me.Label5 = New System.Windows.Forms.Label
       Me.Panel1.SuspendLayout()
       Me.SuspendLayout()
       "
       "Panel1
       "
       Me.Panel1.Anchor = CType((((System.Windows.Forms.AnchorStyles.Top Or System.Windows.Forms.AnchorStyles.Bottom) _
                   Or System.Windows.Forms.AnchorStyles.Left) _
                   Or System.Windows.Forms.AnchorStyles.Right), System.Windows.Forms.AnchorStyles)
       Me.Panel1.AutoScroll = True
       Me.Panel1.Controls.Add(Me.Label5)
       Me.Panel1.Controls.Add(Me.Label4)
       Me.Panel1.Controls.Add(Me.Label2)
       Me.Panel1.Controls.Add(Me.Label1)
       Me.Panel1.Location = New System.Drawing.Point(8, 8)
       Me.Panel1.Name = "Panel1"
       Me.Panel1.Size = New System.Drawing.Size(272, 216)
       Me.Panel1.TabIndex = 0
       "
       "Label1
       "
       Me.Label1.AutoSize = True
       Me.Label1.BorderStyle = System.Windows.Forms.BorderStyle.Fixed3D
       Me.Label1.Location = New System.Drawing.Point(0, 0)
       Me.Label1.Name = "Label1"
       Me.Label1.Size = New System.Drawing.Size(29, 15)
       Me.Label1.TabIndex = 0
       Me.Label1.Text = "(0, 0)"
       "
       "Label2
       "
       Me.Label2.AutoSize = True
       Me.Label2.BorderStyle = System.Windows.Forms.BorderStyle.Fixed3D
       Me.Label2.Location = New System.Drawing.Point(200, 200)
       Me.Label2.Name = "Label2"
       Me.Label2.Size = New System.Drawing.Size(53, 15)
       Me.Label2.TabIndex = 1
       Me.Label2.Text = "(200, 200)"
       "
       "Label3
       "
       Me.Label3.Anchor = CType((System.Windows.Forms.AnchorStyles.Bottom Or System.Windows.Forms.AnchorStyles.Left), System.Windows.Forms.AnchorStyles)
       Me.Label3.AutoSize = True
       Me.Label3.Location = New System.Drawing.Point(0, 232)
       Me.Label3.Name = "Label3"
       Me.Label3.Size = New System.Drawing.Size(44, 13)
       Me.Label3.TabIndex = 1
       Me.Label3.Text = "Scroll to:"
       "
       "txtX
       "
       Me.txtX.Anchor = CType((System.Windows.Forms.AnchorStyles.Bottom Or System.Windows.Forms.AnchorStyles.Left), System.Windows.Forms.AnchorStyles)
       Me.txtX.Location = New System.Drawing.Point(48, 232)
       Me.txtX.Name = "txtX"
       Me.txtX.Size = New System.Drawing.Size(24, 20)
       Me.txtX.TabIndex = 2
       Me.txtX.Text = "50"
       "
       "txtY
       "
       Me.txtY.Anchor = CType((System.Windows.Forms.AnchorStyles.Bottom Or System.Windows.Forms.AnchorStyles.Left), System.Windows.Forms.AnchorStyles)
       Me.txtY.Location = New System.Drawing.Point(72, 232)
       Me.txtY.Name = "txtY"
       Me.txtY.Size = New System.Drawing.Size(24, 20)
       Me.txtY.TabIndex = 3
       Me.txtY.Text = "50"
       "
       "btnScroll
       "
       Me.btnScroll.Anchor = CType((System.Windows.Forms.AnchorStyles.Bottom Or System.Windows.Forms.AnchorStyles.Left), System.Windows.Forms.AnchorStyles)
       Me.btnScroll.Location = New System.Drawing.Point(96, 232)
       Me.btnScroll.Name = "btnScroll"
       Me.btnScroll.Size = New System.Drawing.Size(72, 24)
       Me.btnScroll.TabIndex = 4
       Me.btnScroll.Text = "Scroll"
       "
       "Label4
       "
       Me.Label4.AutoSize = True
       Me.Label4.BorderStyle = System.Windows.Forms.BorderStyle.Fixed3D
       Me.Label4.Location = New System.Drawing.Point(50, 50)
       Me.Label4.Name = "Label4"
       Me.Label4.Size = New System.Drawing.Size(41, 15)
       Me.Label4.TabIndex = 2
       Me.Label4.Text = "(50, 50)"
       "
       "Label5
       "
       Me.Label5.AutoSize = True
       Me.Label5.BorderStyle = System.Windows.Forms.BorderStyle.Fixed3D
       Me.Label5.Location = New System.Drawing.Point(100, 100)
       Me.Label5.Name = "Label5"
       Me.Label5.Size = New System.Drawing.Size(53, 15)
       Me.Label5.TabIndex = 3
       Me.Label5.Text = "(100, 100)"
       "
       "Form1
       "
       Me.AutoScaleDimensions = New System.Drawing.SizeF(6.0!, 13.0!)
       Me.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font
       Me.ClientSize = New System.Drawing.Size(289, 256)
       Me.Controls.Add(Me.btnScroll)
       Me.Controls.Add(Me.txtY)
       Me.Controls.Add(Me.txtX)
       Me.Controls.Add(Me.Label3)
       Me.Controls.Add(Me.Panel1)
       Me.Name = "Form1"
       Me.Text = "UsePanel"
       Me.Panel1.ResumeLayout(False)
       Me.Panel1.PerformLayout()
       Me.ResumeLayout(False)
       Me.PerformLayout()
   End Sub
   Friend WithEvents Panel1 As System.Windows.Forms.Panel
   Friend WithEvents Label2 As System.Windows.Forms.Label
   Friend WithEvents Label1 As System.Windows.Forms.Label
   Friend WithEvents Label3 As System.Windows.Forms.Label
   Friend WithEvents txtX As System.Windows.Forms.TextBox
   Friend WithEvents txtY As System.Windows.Forms.TextBox
   Friend WithEvents btnScroll As System.Windows.Forms.Button
   Friend WithEvents Label5 As System.Windows.Forms.Label
   Friend WithEvents Label4 As System.Windows.Forms.Label

End Class

 </source>

Panel.Refresh()

<source lang="vbnet"> Imports System Imports System.Collections Imports System.ruponentModel Imports System.Windows.Forms Imports System.Data Imports System.Configuration Imports System.Resources Imports System.Drawing Imports System.Drawing.Drawing2D Imports System.Drawing.Imaging Public Class MainClass

   Shared Sub Main()
       Dim myform As Form = New PanningForm()
       Application.Run(myform)
   End Sub

End Class Public Class PanningForm

   Inherits System.Windows.Forms.Form

1. 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
   "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.
   Friend WithEvents upButton As System.Windows.Forms.Button
   Friend WithEvents panel1 As System.Windows.Forms.Panel
   Friend WithEvents downButton As System.Windows.Forms.Button
   Friend WithEvents leftButton As System.Windows.Forms.Button
   Friend WithEvents rightButton As System.Windows.Forms.Button
   <System.Diagnostics.DebuggerStepThrough()> Private Sub InitializeComponent()
       Me.upButton = New System.Windows.Forms.Button()
       Me.panel1 = New System.Windows.Forms.Panel()
       Me.downButton = New System.Windows.Forms.Button()
       Me.leftButton = New System.Windows.Forms.Button()
       Me.rightButton = New System.Windows.Forms.Button()
       Me.SuspendLayout()
       "
       "upButton
       "
       Me.upButton.Anchor = System.Windows.Forms.AnchorStyles.Top
       Me.upButton.Location = New System.Drawing.Point(132, 10)
       Me.upButton.Name = "upButton"
       Me.upButton.Size = New System.Drawing.Size(24, 23)
       Me.upButton.TabIndex = 5
       Me.upButton.Text = "^"
       "
       "panel1
       "
       Me.panel1.Anchor = (((System.Windows.Forms.AnchorStyles.Top Or System.Windows.Forms.AnchorStyles.Bottom) _
                   Or System.Windows.Forms.AnchorStyles.Left) _
                   Or System.Windows.Forms.AnchorStyles.Right)
       Me.panel1.BorderStyle = System.Windows.Forms.BorderStyle.FixedSingle
       Me.panel1.Location = New System.Drawing.Point(36, 43)
       Me.panel1.Name = "panel1"
       Me.panel1.Size = New System.Drawing.Size(216, 184)
       Me.panel1.TabIndex = 2
       "
       "downButton
       "
       Me.downButton.Anchor = System.Windows.Forms.AnchorStyles.Bottom
       Me.downButton.Location = New System.Drawing.Point(132, 234)
       Me.downButton.Name = "downButton"
       Me.downButton.Size = New System.Drawing.Size(24, 23)
       Me.downButton.TabIndex = 6
       Me.downButton.Text = "v"
       "
       "leftButton
       "
       Me.leftButton.Anchor = System.Windows.Forms.AnchorStyles.Left
       Me.leftButton.Location = New System.Drawing.Point(6, 124)
       Me.leftButton.Name = "leftButton"
       Me.leftButton.Size = New System.Drawing.Size(24, 23)
       Me.leftButton.TabIndex = 3
       Me.leftButton.Text = "<"
       "
       "rightButton
       "
       Me.rightButton.Anchor = System.Windows.Forms.AnchorStyles.Right
       Me.rightButton.Location = New System.Drawing.Point(262, 124)
       Me.rightButton.Name = "rightButton"
       Me.rightButton.Size = New System.Drawing.Size(24, 23)
       Me.rightButton.TabIndex = 4
       Me.rightButton.Text = ">"
       "
       "PanningForm
       "
       Me.AutoScaleBaseSize = New System.Drawing.Size(5, 13)
       Me.ClientSize = New System.Drawing.Size(292, 266)
       Me.Controls.AddRange(New System.Windows.Forms.Control() {Me.upButton, Me.panel1, Me.downButton, Me.leftButton, Me.rightButton})
       Me.Name = "PanningForm"
       Me.Text = "PanningForm"
       Me.ResumeLayout(False)
   End Sub

1. End Region

   Dim bmp As Bitmap = New Bitmap("figure2.bmp")
   Dim offset As Size = New Size(0, 0)
   Private Sub panel1_Paint(ByVal sender As Object, ByVal e As PaintEventArgs) Handles panel1.Paint
       Dim g As Graphics = e.Graphics
       Dim destRect As Rectangle = Me.panel1.ClientRectangle
       Dim srcRect As Rectangle = New Rectangle(offset.Width, offset.Height, destRect.Width, destRect.Height)
       g.DrawImage(bmp, destRect, srcRect, g.PageUnit)
   End Sub
   Private Sub upButton_Click(ByVal sender As Object, ByVal e As EventArgs) Handles upButton.Click
       offset.Height = offset.Height + 10
       panel1.Refresh()
   End Sub
   Private Sub downButton_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles downButton.Click
       offset.Height = offset.Height - 10
       panel1.Refresh()
   End Sub
   Private Sub rightButton_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles rightButton.Click
       offset.Width = offset.Width + 10
       panel1.Refresh()
   End Sub
   Private Sub leftButton_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles leftButton.Click
       offset.Width = offset.Width - 10
       panel1.Refresh()
   End Sub

End Class

 </source>