VB.Net Interaction/interoperability between apps

[mwedge]

I know this must be simple, but it's baffling me and time is marching on...

I have an app (written in VB 2005) with a public method ('refreshData') which I need to be able to run from another app. So if the 1st app is called 'Scriptable', then the syntax in the 2nd app is something like this:

Dim x As New Scriptable.app
x.Visible = True
x.refreshData()

But of course when I run this, it creates a new instance of Scriptable. What I want is to be able to address the instance that is already running.

Can anyone help save my sanity here??