Closes a ZIP archive opened by UnzipOpen().
Synopsis
error = UnzipClose(ZipHandle)
Args
ZipHandle is the handle returned by UnzipOpen(). If omitted, then all ZIP archives that you have UnzipOpen'ed are closed.
Returns
An empty string if the ZIP archive is successfully closed, or an error message if not. (If ZipErr is set to "NUM", then 0 is returned for success, or an error number).
Notes
It is not considered an error to call UnzipClose if the ZIP archive is not opened.
If you do not call UnzipClose, then when your main script ends, RxUnzip.DLL will automatically close any ZIP archives for you. So cleanup is done automatically when your main script ends.