I need some help with code to do the following:

If a file like: BankNumber & "-Cost Centers.xls" exists in the directory
we're currently using THEN

useform.field_the_the_form.visible = False

BankNumber is defined as a string and is a dynamic part of the file name.

Also, where should this appear within my code? Should it be it's own module
or can it be right on the userform I'm munipulating the fields based on
whether or not the file exists?