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From: akcs.falco@hpcvbbs.UUCP (Andrey Dolgachev)
Newsgroups: comp.sys.handhelds
Subject: Re: Protect for HP48 (attn: Bill Wickes)
Message-ID: <27fd1a6f:2013.2comp.sys.handhelds;1@hpcvbbs.UUCP>
Date: 6 Apr 91 01:40:04 GMT
References: <27b7409e:2013comp.sys.handhelds@hpcvbbs.UUCP> <27fd0531:2013.1comp
Lines: 20

The hidden directory is imply another directory or even a variable with a
null name for its label which means that it does not appear on the menu. 
To get a unquoted null name, which means that you would go to the hidden
directory (if there is one on that level) simply type in #15781h SYSEVAL.
 To get the quoted null name, which looks like '', but is notjust '' with
nothing in the middle, type in #15777h SYSEVAL.  Now just use this null
name, like a normal name, you can STO programs in or use CRDIR on it.  At
the top level, there is already a null directory, this is used to store
the alarms and userkey assignments.  However, you can not edit anything
with a null name in it.  Another interesting ide is that if you have a
null directory or null variable, it also hides everything after it in the
order of the menu.  Play aroudn with it, you can store things in a null
name, you can use ORDER (use LIST-> and PRG-> to put some thing into a
list or a program, or call a list containing a null name from a program
if you don't have PRG->) to hide your variables, whatever.
        Enjoy,
The problem with putting a large number of OFFS in a program, which is
also possible, is that you dcan't have a password prtection, and it also
works against the owner.
            --Falco