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What is the value of a Word Legacy Text Form Field if nothing is entered?

I have a Word-based form that a user populates, and it includes legacy text form fields. When they are not filled in, these forms return what turns out in Excel (as in, in a worksheet) to be five spaces. If the user didn't enter anything, I want it to be blank. However, for the life of me, I can't figure out what these "five spaces" actually are in terms of characters. They are very clearly not five spaces, and I'm not aware of a five-space tab that can be called using Chr(). How can I find out what Word is actually returning from these unfilled form fields?

Each of the five characters is Asc(32) .

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