VB.NET - Way to disable some code when running in the Visual Studio editor

Hi,
I have an app that runs a timer continuously to update the status bar of my application with the details of the currently selected customer record and also the details of an additional record in a separate pane. I want the timer running as it picks up when a new sub record is added and allows me to display messages that clear after a few seconds and revert back to the normal status message.  

It works really well except when I am debugging, as when stepping the code it keeps flicking back to the routine that does the updated status bar and then returns back to the code I am stepping. It's not the end of the World, but it gets very annoying when you are stepping through some complex code and don't want to lose your concentration.

I tried putting in a conditional compilation:

#If Not Debug Then
    Private Sub tmrUpdateStatusBar_Tick(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles tmrUpdateStatusBar.Tick
        SBar1.Panels(0).Text = "Client ID is: " & lblClientIDValue.Text & " Details: " & CurrentClientDetails & "."
    End Sub
#End If

I now realise that this mechanism just changes what gets compiled depending on the project configuration is debug or release not whether I am debugging the code by stepping in the editor.

Is there another code constructy that I can put in that effectively says, "don't run this if I am stepping the code in the editor" but do run it if you are running without stepping?

Any help appreciared.

Siv