Scrolling Text by Timer : Timer « GUI « VB.Net Tutorial

1. VB.Net Tutorial
2. GUI
3. 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.ComponentModel.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.components = New System.ComponentModel.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.components)
        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

14.90.Timer
	14.90.1.	Timer interval
	14.90.2.	Use Timer to refresh Label
	14.90.3.	Timer event
	14.90.4.	Timer Start and Stop
	14.90.5.	Scrolling Text by Timer
	14.90.6.	Use three timers
	14.90.7.	Set up an event handler for the Timer.Elapsed event, creates a timer, and starts the timer