VB.Net Tutorial/GUI/Timer

Scrolling Text by Timer

Imports System.Windows.Forms
public class ScrollingText
   public Shared Sub Main
        Application.Run(New Form1)
   End Sub
End class
Public Class Form1
    Inherits System.Windows.Forms.Form
    Public Sub New()
        MyBase.New()
        InitializeComponent()
    End Sub
    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
    Private components As System.ruponentModel.IContainer
    Friend WithEvents Label1 As System.Windows.Forms.Label
    Friend WithEvents Button1 As System.Windows.Forms.Button
    Friend WithEvents Button2 As System.Windows.Forms.Button
    Friend WithEvents Button3 As System.Windows.Forms.Button
    Friend WithEvents Timer1 As System.Windows.Forms.Timer
    <System.Diagnostics.DebuggerStepThrough()> Private Sub InitializeComponent()
        Me.ruponents = New System.ruponentModel.Container
        Me.Label1 = New System.Windows.Forms.Label
        Me.Button1 = New System.Windows.Forms.Button
        Me.Button2 = New System.Windows.Forms.Button
        Me.Button3 = New System.Windows.Forms.Button
        Me.Timer1 = New System.Windows.Forms.Timer(Me.ruponents)
        Me.SuspendLayout()
        "
        "Label1
        "
        Me.Label1.Font = New System.Drawing.Font("Microsoft Sans Serif", 15.75!, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, CType(0, Byte))
        Me.Label1.Location = New System.Drawing.Point(32, 32)
        Me.Label1.Name = "Label1"
        Me.Label1.Size = New System.Drawing.Size(216, 24)
        Me.Label1.TabIndex = 0
        Me.Label1.Text = "Scrolling Text"
        "
        "Button1
        "
        Me.Button1.Location = New System.Drawing.Point(24, 80)
        Me.Button1.Name = "Button1"
        Me.Button1.Size = New System.Drawing.Size(72, 24)
        Me.Button1.TabIndex = 1
        Me.Button1.Text = "Start"
        "
        "Button2
        "
        Me.Button2.Location = New System.Drawing.Point(112, 80)
        Me.Button2.Name = "Button2"
        Me.Button2.Size = New System.Drawing.Size(64, 24)
        Me.Button2.TabIndex = 2
        Me.Button2.Text = "Stop"
        "
        "Button3
        "
        Me.Button3.Location = New System.Drawing.Point(192, 80)
        Me.Button3.Name = "Button3"
        Me.Button3.Size = New System.Drawing.Size(72, 24)
        Me.Button3.TabIndex = 3
        Me.Button3.Text = "Exit"
        "
        "Timer1
        "
        Me.Timer1.Interval = 300
        "
        "Form1
        "
        Me.AutoScaleBaseSize = New System.Drawing.Size(5, 13)
        Me.ClientSize = New System.Drawing.Size(292, 150)
        Me.Controls.Add(Me.Button3)
        Me.Controls.Add(Me.Button2)
        Me.Controls.Add(Me.Button1)
        Me.Controls.Add(Me.Label1)
        Me.Name = "Form1"
        Me.Text = "Scroll Text"
        Me.ResumeLayout(False)
    End Sub
    Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
        Do While Label1.Text.Length < 13
            Label1.Text = Label1.Text & " "
        Loop
        Label1.AutoSize = True
        Timer1.Start()
    End Sub
    Private Sub Button2_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button2.Click
        Timer1.Stop()
    End Sub
    Private Sub Button3_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button3.Click
        End
    End Sub
    Private Sub Timer1_Tick(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Timer1.Tick
        Label1.Text = Microsoft.VisualBasic.Right(Label1.Text, 1) & Microsoft.VisualBasic.Left(Label1.Text, Label1.Text.Length - 1)
    End Sub
End Class

Timer event

Imports System.Windows.Forms
public class TimerEvent
   public Shared Sub Main
        Application.Run(New Form1)
   End Sub
End class
Public Class Form1
    Inherits System.Windows.Forms.Form
    Public Sub New()
        MyBase.New()
        InitializeComponent()
    End Sub
    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
    Private components As System.ruponentModel.IContainer
    Friend WithEvents Label1 As System.Windows.Forms.Label
    Friend WithEvents Label2 As System.Windows.Forms.Label
    Friend WithEvents Timer1 As System.Windows.Forms.Timer
    Friend WithEvents TextBox1 As System.Windows.Forms.TextBox
    Friend WithEvents TextBox2 As System.Windows.Forms.TextBox
    <System.Diagnostics.DebuggerStepThrough()> Private Sub InitializeComponent()
        Me.ruponents = New System.ruponentModel.Container
        Me.Label1 = New System.Windows.Forms.Label
        Me.Label2 = New System.Windows.Forms.Label
        Me.Timer1 = New System.Windows.Forms.Timer(Me.ruponents)
        Me.TextBox1 = New System.Windows.Forms.TextBox
        Me.TextBox2 = New System.Windows.Forms.TextBox
        Me.SuspendLayout()
        "
        "Label1
        "
        Me.Label1.Location = New System.Drawing.Point(16, 24)
        Me.Label1.Name = "Label1"
        Me.Label1.Size = New System.Drawing.Size(112, 24)
        Me.Label1.TabIndex = 0
        Me.Label1.Text = "Systen Date"
        "
        "Label2
        "
        Me.Label2.Location = New System.Drawing.Point(16, 80)
        Me.Label2.Name = "Label2"
        Me.Label2.Size = New System.Drawing.Size(112, 24)
        Me.Label2.TabIndex = 1
        Me.Label2.Text = "System Time"
        "
        "Timer1
        "
        "
        "TextBox1
        "
        Me.TextBox1.Location = New System.Drawing.Point(112, 16)
        Me.TextBox1.Name = "TextBox1"
        Me.TextBox1.Size = New System.Drawing.Size(104, 20)
        Me.TextBox1.TabIndex = 2
        Me.TextBox1.Text = ""
        "
        "TextBox2
        "
        Me.TextBox2.Location = New System.Drawing.Point(112, 72)
        Me.TextBox2.Name = "TextBox2"
        Me.TextBox2.Size = New System.Drawing.Size(104, 20)
        Me.TextBox2.TabIndex = 3
        Me.TextBox2.Text = ""
        "
        "Form1
        "
        Me.AutoScaleBaseSize = New System.Drawing.Size(5, 13)
        Me.ClientSize = New System.Drawing.Size(292, 158)
        Me.Controls.Add(Me.TextBox2)
        Me.Controls.Add(Me.TextBox1)
        Me.Controls.Add(Me.Label2)
        Me.Controls.Add(Me.Label1)
        Me.Name = "Form1"
        Me.Text = "Form1"
        Me.ResumeLayout(False)
    End Sub
    Private Sub Timer1_Tick(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Timer1.Tick
        Dim TDay As String
        Dim i As Short
        TextBox2.Text = CStr(TimeOfDay)
        i = Weekday(Today)
        Select Case i
            Case 1
                TDay = "Sunday"
            Case 2
                TDay = "Monday"
            Case 3
                TDay = "Tuesday"
            Case 4
                TDay = "Wednesday"
            Case 5
                TDay = "Thursday"
            Case 6
                TDay = "Friday"
            Case 7
                TDay = "Saturday"
        End Select
        TextBox1.Text = TDay & "," & Today
    End Sub
    Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
        Me.Timer1.Start()
    End Sub
End Class

Timer interval

imports System
imports System.Drawing
imports System.Windows.Forms
public class Timers : inherits Form
  dim lblTime as Label
  public sub New()
    Size = new Size(300,100)
    lblTime = new Label()
    lblTime.Parent = me
    lblTime.Size = new Size(200, 25)
    lblTime.Location = new Point(20,20)
    lblTime.BorderStyle = BorderStyle.FixedSingle
    lblTime.TextAlign = ContentAlignment.MiddleCenter
    dim t as new Timer()
    t.Interval = 100
    t.Start()
    AddHandler t.Tick, AddressOf t_Tick
  end sub
  public shared sub Main() 
    Application.Run(new Timers())
  end sub
  private sub t_Tick(ByVal sender as object,ByVal e as EventArgs)
    lblTime.Text = DateTime.Now.ToString("dddd, MMMM d, yyyy  h:mm:ss tt")
  end sub
end class

Timer Start and Stop

Imports System.Windows.Forms
public class ScrollingText
   public Shared Sub Main
        Application.Run(New Form1)
   End Sub
End class
Public Class Form1
    Inherits System.Windows.Forms.Form
    Public Sub New()
        MyBase.New()
        InitializeComponent()
    End Sub
    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
    Private components As System.ruponentModel.IContainer
    Friend WithEvents Label1 As System.Windows.Forms.Label
    Friend WithEvents Button1 As System.Windows.Forms.Button
    Friend WithEvents Button2 As System.Windows.Forms.Button
    Friend WithEvents Button3 As System.Windows.Forms.Button
    Friend WithEvents Timer1 As System.Windows.Forms.Timer
    <System.Diagnostics.DebuggerStepThrough()> Private Sub InitializeComponent()
        Me.ruponents = New System.ruponentModel.Container
        Me.Label1 = New System.Windows.Forms.Label
        Me.Button1 = New System.Windows.Forms.Button
        Me.Button2 = New System.Windows.Forms.Button
        Me.Button3 = New System.Windows.Forms.Button
        Me.Timer1 = New System.Windows.Forms.Timer(Me.ruponents)
        Me.SuspendLayout()
        "
        "Label1
        "
        Me.Label1.Font = New System.Drawing.Font("Microsoft Sans Serif", 15.75!, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, CType(0, Byte))
        Me.Label1.Location = New System.Drawing.Point(32, 32)
        Me.Label1.Name = "Label1"
        Me.Label1.Size = New System.Drawing.Size(216, 24)
        Me.Label1.TabIndex = 0
        Me.Label1.Text = "Scrolling Text"
        "
        "Button1
        "
        Me.Button1.Location = New System.Drawing.Point(24, 80)
        Me.Button1.Name = "Button1"
        Me.Button1.Size = New System.Drawing.Size(72, 24)
        Me.Button1.TabIndex = 1
        Me.Button1.Text = "Start"
        "
        "Button2
        "
        Me.Button2.Location = New System.Drawing.Point(112, 80)
        Me.Button2.Name = "Button2"
        Me.Button2.Size = New System.Drawing.Size(64, 24)
        Me.Button2.TabIndex = 2
        Me.Button2.Text = "Stop"
        "
        "Button3
        "
        Me.Button3.Location = New System.Drawing.Point(192, 80)
        Me.Button3.Name = "Button3"
        Me.Button3.Size = New System.Drawing.Size(72, 24)
        Me.Button3.TabIndex = 3
        Me.Button3.Text = "Exit"
        "
        "Timer1
        "
        Me.Timer1.Interval = 300
        "
        "Form1
        "
        Me.AutoScaleBaseSize = New System.Drawing.Size(5, 13)
        Me.ClientSize = New System.Drawing.Size(292, 150)
        Me.Controls.Add(Me.Button3)
        Me.Controls.Add(Me.Button2)
        Me.Controls.Add(Me.Button1)
        Me.Controls.Add(Me.Label1)
        Me.Name = "Form1"
        Me.Text = "Scroll Text"
        Me.ResumeLayout(False)
    End Sub
    Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
        Do While Label1.Text.Length < 13
            Label1.Text = Label1.Text & " "
        Loop
        Label1.AutoSize = True
        Timer1.Start()
    End Sub
    Private Sub Button2_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button2.Click
        Timer1.Stop()
    End Sub
    Private Sub Button3_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button3.Click
        End
    End Sub
    Private Sub Timer1_Tick(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Timer1.Tick
        Label1.Text = Microsoft.VisualBasic.Right(Label1.Text, 1) & Microsoft.VisualBasic.Left(Label1.Text, Label1.Text.Length - 1)
    End Sub
End Class

Use three timers

Imports System.Windows.Forms

public class ThreeTimers
   public Shared Sub Main
        Application.Run(New Form1)
   End Sub
End class
Public Class Form1
    Private Sub tmrTenthSecond_Tick(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles tmrTenthSecond.Tick
        lblTenthSecond.Text = Now.ToString("hh:mm:ss.f")
    End Sub
    Private Sub tmrSecond_Tick(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles tmrSecond.Tick
        lblSeconds.Text = Now.ToString("hh:mm:ss")
    End Sub
    Private Sub tmrTenSeconds_Tick(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles tmrTenSeconds.Tick
        lblTenSeconds.Text = Now.ToString("hh:mm:ss")
    End Sub
    " Display initial times.
    Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
        lblTenthSecond.Text = Now.ToString("hh:mm:ss.f")
        lblSeconds.Text = Now.ToString("hh:mm:ss")
        lblTenSeconds.Text = Now.ToString("hh:mm:ss")
    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.ruponents = New System.ruponentModel.Container
        Me.tmrTenthSecond = New System.Windows.Forms.Timer(Me.ruponents)
        Me.tmrSecond = New System.Windows.Forms.Timer(Me.ruponents)
        Me.tmrTenSeconds = New System.Windows.Forms.Timer(Me.ruponents)
        Me.Label1 = New System.Windows.Forms.Label
        Me.Label2 = New System.Windows.Forms.Label
        Me.Label3 = New System.Windows.Forms.Label
        Me.lblTenthSecond = New System.Windows.Forms.Label
        Me.lblSeconds = New System.Windows.Forms.Label
        Me.lblTenSeconds = New System.Windows.Forms.Label
        Me.SuspendLayout()
        "
        "tmrTenthSecond
        "
        Me.tmrTenthSecond.Enabled = True
        "
        "tmrSecond
        "
        Me.tmrSecond.Enabled = True
        Me.tmrSecond.Interval = 1000
        "
        "tmrTenSeconds
        "
        Me.tmrTenSeconds.Enabled = True
        Me.tmrTenSeconds.Interval = 10000
        "
        "Label1
        "
        Me.Label1.AutoSize = True
        Me.Label1.Location = New System.Drawing.Point(8, 8)
        Me.Label1.Name = "Label1"
        Me.Label1.Size = New System.Drawing.Size(46, 13)
        Me.Label1.TabIndex = 0
        Me.Label1.Text = "1/10 sec"
        "
        "Label2
        "
        Me.Label2.AutoSize = True
        Me.Label2.Location = New System.Drawing.Point(8, 32)
        Me.Label2.Name = "Label2"
        Me.Label2.Size = New System.Drawing.Size(29, 13)
        Me.Label2.TabIndex = 1
        Me.Label2.Text = "1 sec"
        "
        "Label3
        "
        Me.Label3.AutoSize = True
        Me.Label3.Location = New System.Drawing.Point(8, 56)
        Me.Label3.Name = "Label3"
        Me.Label3.Size = New System.Drawing.Size(35, 13)
        Me.Label3.TabIndex = 2
        Me.Label3.Text = "10 sec"
        "
        "lblTenthSecond
        "
        Me.lblTenthSecond.BorderStyle = System.Windows.Forms.BorderStyle.Fixed3D
        Me.lblTenthSecond.Location = New System.Drawing.Point(72, 8)
        Me.lblTenthSecond.Name = "lblTenthSecond"
        Me.lblTenthSecond.Size = New System.Drawing.Size(80, 16)
        Me.lblTenthSecond.TabIndex = 3
        "
        "lblSeconds
        "
        Me.lblSeconds.BorderStyle = System.Windows.Forms.BorderStyle.Fixed3D
        Me.lblSeconds.Location = New System.Drawing.Point(72, 32)
        Me.lblSeconds.Name = "lblSeconds"
        Me.lblSeconds.Size = New System.Drawing.Size(80, 16)
        Me.lblSeconds.TabIndex = 4
        "
        "lblTenSeconds
        "
        Me.lblTenSeconds.BorderStyle = System.Windows.Forms.BorderStyle.Fixed3D
        Me.lblTenSeconds.Location = New System.Drawing.Point(72, 56)
        Me.lblTenSeconds.Name = "lblTenSeconds"
        Me.lblTenSeconds.Size = New System.Drawing.Size(80, 16)
        Me.lblTenSeconds.TabIndex = 5
        "
        "Form1
        "
        Me.AutoScaleDimensions = New System.Drawing.SizeF(6.0!, 13.0!)
        Me.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font
        Me.ClientSize = New System.Drawing.Size(167, 88)
        Me.Controls.Add(Me.lblTenSeconds)
        Me.Controls.Add(Me.lblSeconds)
        Me.Controls.Add(Me.lblTenthSecond)
        Me.Controls.Add(Me.Label3)
        Me.Controls.Add(Me.Label2)
        Me.Controls.Add(Me.Label1)
        Me.Name = "Form1"
        Me.Text = "UseTimer"
        Me.ResumeLayout(False)
        Me.PerformLayout()
    End Sub
    Friend WithEvents tmrTenthSecond As System.Windows.Forms.Timer
    Friend WithEvents tmrSecond As System.Windows.Forms.Timer
    Friend WithEvents tmrTenSeconds As System.Windows.Forms.Timer
    Friend WithEvents Label1 As System.Windows.Forms.Label
    Friend WithEvents Label2 As System.Windows.Forms.Label
    Friend WithEvents Label3 As System.Windows.Forms.Label
    Friend WithEvents lblTenthSecond As System.Windows.Forms.Label
    Friend WithEvents lblSeconds As System.Windows.Forms.Label
    Friend WithEvents lblTenSeconds As System.Windows.Forms.Label
End Class

Use Timer to refresh Label

Imports System.Windows.Forms
<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.ruponents = New System.ruponentModel.Container
        Me.CurrentTime = New System.Windows.Forms.Label
        Me.ClockTimer = New System.Windows.Forms.Timer(Me.ruponents)
        Me.SuspendLayout()
        "
        "CurrentTime
        "
        Me.CurrentTime.AutoSize = True
        Me.CurrentTime.Location = New System.Drawing.Point(8, 8)
        Me.CurrentTime.Name = "CurrentTime"
        Me.CurrentTime.Size = New System.Drawing.Size(39, 13)
        Me.CurrentTime.TabIndex = 0
        Me.CurrentTime.Text = "Label1"
        "
        "ClockTimer
        "
        Me.ClockTimer.Enabled = True
        Me.ClockTimer.Interval = 1000
        "
        "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, 35)
        Me.Controls.Add(Me.CurrentTime)
        Me.FormBorderStyle = System.Windows.Forms.FormBorderStyle.FixedSingle
        Me.MaximizeBox = False
        Me.Name = "Form1"
        Me.Text = "Clock Timer"
        Me.ResumeLayout(False)
        Me.PerformLayout()
    End Sub
    Friend WithEvents CurrentTime As System.Windows.Forms.Label
    Friend WithEvents ClockTimer As System.Windows.Forms.Timer
End Class
Public Class Form1
    Private Sub ClockTimer_Tick(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles ClockTimer.Tick
        CurrentTime.Text = Now.ToLongTimeString
    End Sub
End Class

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