Select directory in illustrator

[OhmsG]

The following allows me to selecct a file:

window.cep.fs.showOpenDialogEx(false, false);

How would I select a directory?

Not a file I just need to select the directory.

[Ten A]

Set the 2nd argument to True. 

reference:

showOpenDialogEx (allowMultipleSelection, chooseDirectory, title, initialPath, fileTypes, friendlyFilePrefix, prompt)