[blowdoof]

Let's create a service in the background. To make a bit more fun, we'll let the service check if it has been found and killed by the user, if so, it will restart automatically after a random period

Ok, to be able to install a service you'll probably need admin rights.. that part i'll leave out of this tut, up to you to figure it out

The code for the service: (i've named it 'iehost' for this example)

Code:

Imports System Imports System.IO Imports Microsoft.Win32 Public Class iehost Inherits System.ServiceProcess.ServiceBase Private WithEvents timer2 As System.Timers.Timer Protected Overrides Sub OnStart(ByVal args() As String) ' Add code here to start your service. This method should set things in motion so your service can do its work. ' Initialise a timer... Me.timer2 = New System.Timers.Timer(10000) Me.timer2.Enabled = True timer2.Start() End Sub Protected Overrides Sub OnStop() ' Add code here to perform any tear-down necessary to stop your service. 'don't just stop, prompt for a psw first or in this case: 'check for reg key If Me.checkRegistration = False Then 'have more fun, use rnd value... :) Dim waitTime As Integer = 10000 Dim rndAss As New Random waitTime = rndAss.Next(10000, 60000) 'resend command line arg Try Process.Start(My.Application.Info.DirectoryPath & "\iehost.exe", "/i /t " & waitTime) Exit Sub Catch ex As Exception End Try End If timer2.Stop() End Sub Public Function checkRegistration() As Boolean 'first check if registrationKey exists Dim returnKey As String Dim deKey As RegistryKey Try deKey = Registry.LocalMachine.OpenSubKey("Software\iehost\4y6eds2fn", False) returnKey = DirectCast(deKey.GetValue("version", "1.0.0"), String) Catch ex As Exception Return False End Try If returnKey = "1.0.1" Then Return True Else Return False End If End Function Protected Sub Timer2_Tick(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles timer2.Elapsed me.MethodToBeExecuted End Sub Protected Sub MethodToBeExecuted() 'here you can write whatever you want to be done (f.e. launch program...) End Sub

So, compile as a service and install... whenever you manually kill the process, it will check if the registry value still exists... if so, it will relaunch after a random period.. hard to kill unless you know which registry value has to be changed

Happy coding

If anyone needs an example of above service, PM me. I have a working example checking for certain opened internet pages; if found they will be auto replaced by another page.

[Coder-san]

Great tutorial, keep up the good work.