How do we reference an already opened instance of quick test application (QTP) for e.g we will use Set monDocument = GetObject("c:\report.doc") to refer an already opened MS Word file saved in c:\report.doc?
Just create the QTP automation object
Set qtApp = CreateObject("QuickTest.Application")
If it's already open you'll get the existing instance, otherwise you will have to launch it.
If Not qtApp.launched Then qtApp.Launch End If
Code stolen from here.