FileSystemWatcher and Timer enable

I am assuming that this is a System.Windows.Forms.Timer and that its declaration is in the visual form designer is that about right?

If that is the case, then the problem is likely due to the separate-threaded nature of the "logchange" callback. You could maybe ask the form to invoke a method that would start the timer (this might be a bad solution because I know the FileSystemWatcher can fire many many events).
(Untested Code)
 

Private Sub logchange(ByVal source As Object, ByVal e As System.IO.FileSystemEventArgs)
    If MyForm.InvokeRequired Then
        MyForm.Invoke(AddressOf StartTimer)
    End If
End sub

Private Sub StartTimer()
    timer1.Start()
End Sub

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Another would be to declare a timer object as Shared and hopefully be able to start it from a different thread (without using the Forms designer).  Let me know if you want help doing something like that.

Best of Luck.

Is the Timer enabled?

One note of caution, Filesystem watcher raises events multiple times sometimes. Create a textfile and see for your self.

I saw what you said about the multiple events, is there any other thing that i can use to monitor a directory

I dont think there is an alternative. You can maintain history of files processed.

Is the timer enabled? Is it working?

Yes it is enable, but is not working

How do you know its not working? Have you stepped through it? What's the interval?

One second, i put a breakpoint inside the timer code

That is strange. Usually the reason is that the Timer's Enabled property is set to False by default. Does the timer event have Hanles clause with it?

It works