Imports System.Threading
Public Class Form1
    Inherits System.Windows.Forms.Form

#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.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.
    Friend WithEvents Button1 As System.Windows.Forms.Button
    Friend WithEvents Button2 As System.Windows.Forms.Button
    <System.Diagnostics.DebuggerStepThrough()> Private Sub InitializeComponent()
        Me.Button1 = New System.Windows.Forms.Button()
        Me.Button2 = New System.Windows.Forms.Button()
        Me.SuspendLayout()
        '
        'Button1
        '
        Me.Button1.Font = New System.Drawing.Font("Microsoft Sans Serif", 14.25!, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, CType(178, Byte))
        Me.Button1.Location = New System.Drawing.Point(150, 120)
        Me.Button1.Name = "Button1"
        Me.Button1.Size = New System.Drawing.Size(104, 32)
        Me.Button1.TabIndex = 0
        Me.Button1.Text = "رسالة مستقلّة"
        '
        'Button2
        '
        Me.Button2.Font = New System.Drawing.Font("Microsoft Sans Serif", 14.25!, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, CType(178, Byte))
        Me.Button2.Location = New System.Drawing.Point(38, 120)
        Me.Button2.Name = "Button2"
        Me.Button2.Size = New System.Drawing.Size(96, 32)
        Me.Button2.TabIndex = 1
        Me.Button2.Text = "رسالة عاديّة"
        '
        'Form1
        '
        Me.AutoScaleBaseSize = New System.Drawing.Size(5, 13)
        Me.ClientSize = New System.Drawing.Size(292, 270)
        Me.Controls.AddRange(New System.Windows.Forms.Control() {Me.Button2, Me.Button1})
        Me.Name = "Form1"
        Me.Text = "Form1"
        Me.ResumeLayout(False)

    End Sub

#End Region
    Private Sub BackgroundProcess()
        MsgBox("هذه عمليّة مستقلّة ولا تؤثّر على البرنامج الأصليّ")
    End Sub

    Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
        ' عرّف متغيّر للعمليّة
        Dim t As Thread
        ' أرسل لهذه العمليّة عنوان الإجراء الذي ستنفّذه
        t = New Thread(AddressOf BackgroundProcess)
        ' لو أضفت السطر التالي للبرنامج، فسيتمّ إغلاق الرسالة عند إغلاق البرنامج
        't.IsBackground = True
        ' ابدأ تنفيذ العمليّة
        t.Start()
    End Sub

    Private Sub Button2_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button2.Click
        MsgBox("أغلق هذه الرسالة أولا")
    End Sub
End Class