Function that will take a path that includes aliases (shortcuts on Windows) and convert the path to an absolute path.
The field "Entry" in this stack accepts only the characters in its cAllowedChars custom property. The "AllowedCharsBehavior" button provides the necessary behavior (adapted from Devin Asay's Password Field behavior). To try out the behavior, type the allowed chars in the "AllowedChars" field and click the Set button. (The cAllowedChars is NOT a list of items, just a set of characters, so that any characters -- including commas or other delimiters -- can be allowed.)