Hello,
I am sorry for the delay in responding.
From what I can tell, "Expect" is a stand-alone language of sorts that allows you to automate other applications and their execution. National Instruments' TestStand software provides similar application automation of other NI applications (such as LabVIEW). Unless you can build Expect scripts into DLLs or executables or something like that, you will not be able to implement them in LabVIEW or TestStand, as they are their own automation software.
Please let me know if you would like further clarification or information about TestStand or LabVIEW, or calling external code in either environment, and I would be happy to help.
Liz F
National Instruments