Is there a way for Omnis Studio to only look into a specific folder when calling FileOps?

Question

Is there anyway to prevent a user in Omnis Studio from navigating around in various directory's on a machine?

for example.

I want the end user to import a delimited file. I would do something like: FileOps.$getfilename(&cPath[,cPrompt,cFilter,cInitialDirectory,iAppflags])

How do I prevent them from being able to navigate outside the initial directory that is defined? (when the file dialog is open).