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You can create a new Windows service easily in Visual Basic—just use the File|New|Project menu item, select the Windows Service icon in the templates box, and click OK.
For example, we created a full working Windows service example, WindowsService, in the In Depth section of this chapter—see that section for the details. Here's the code for that Windows service, Service1.vb:
Imports System.ServiceProcess Public Class Service1 Inherits System.ServiceProcess.ServiceBase #Region " Component Designer generated code " Public Sub New() MyBase.New() ' This call is required by the Component Designer. InitializeComponent() ' Add any initialization after the InitializeComponent() call If Not EventLog1.SourceExists("Source1") Then EventLog1.CreateEventSource("Source1", "NewLog1") End If EventLog1.Source = "Source1" End Sub 'UserService 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 ' The main entry point for the process <MTAThread()> _ Shared Sub Main() Dim ServicesToRun() As System.ServiceProcess.ServiceBase ' More than one NT Service may run within the same process. To add ' another service to this process, change the following line to ' create a second service object. For example, ' ' ServicesToRun = New System.ServiceProcess.ServiceBase () {New ' Service1, New MySecondUserService} ' ServicesToRun = New System.ServiceProcess.ServiceBase () _ {New Service1} System.ServiceProcess.ServiceBase.Run(ServicesToRun) End Sub 'Required by the Component Designer Private components As System.ComponentModel.IContainer ' NOTE: The following procedure is required by the Component Designer ' It can be modified using the Component Designer. ' Do not modify it using the code editor. Friend WithEvents EventLog1 As System.Diagnostics.EventLog <System.Diagnostics.DebuggerStepThrough()> Private Sub _ InitializeComponent() Me.EventLog1 = New System.Diagnostics.EventLog() CType(Me.EventLog1, _ System.ComponentModel.ISupportInitialize).BeginInit() ' 'EventLog1 ' Me.EventLog1.Log = "NewLog1" Me.EventLog1.Source = "Source1" ' 'Service1 ' Me.ServiceName = "Service1" CType(Me.EventLog1, _ System.ComponentModel.ISupportInitialize).EndInit() End Sub #End Region Protected Overrides Sub OnStart(ByVal args() As String) EventLog1.WriteEntry("Starting...") End Sub Protected Overrides Sub OnStop() EventLog1.WriteEntry("Stopping...") End Sub End Class
Tip |
You also can add a notify icon for your Windows service to the taskbar in Windows—see "Creating Notify Icons and Using Icon Designers" in Chapter 8. |
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