You can download lvwutil32.zip from http://zone.ni.com/devzone/devzoneweb.nsf/opendoc?openagent&74DDE683A1AFF6988625683A000C0D73&cat=034E59A8530E09DF862568900018707A
Inside the zip file there are a couple of libraries with many useful utilities to interact with Windows.
Get Task List.vi gives you an array of strings with the names of active tasks in the computer, which you can browse in order to detect if the executable you are looking for is actually running (I don't know what happens if that exe removes himself from the task list...)
Hope this helps
Roberto
