For this topic's original documentation, see the RESOURCE Mnemonic - Invoke Prepared Resource.
A resource cannot be displayed after the SYSGUI channel has been closed and reopened. In BBx, the string returned from RESGET was a string representing all the information in the resource. Therefore, it could be used, even after the SYSGUI channel was closed. In BBj, the string no longer represents an entire resource, and the string returned from RESGET is only valid in the SYSGUI channel the resource was opened in using the RESOPEN() Function - Open Resource File.