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_FUNKY.REM
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1986-05-05
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Text File _funky.rem
FUNKY.COM
The purpose of the FUNKY utility is to allow the user of a Batch File to answer
a prompting message or comment with any key that generates an "extended" key
code. Examples of such keys include the Function Keys F1 - F10 (also, the
shifted, Ctrl, and Alt F1 - F10), the Cursor Control ("arrow") keys, and many
other Alt and Ctrl key combinations. A complete list is available later in
this tutorial. When the user answers the prompt with such a key, the FUNKY
utility then sets the system "errorlevel" parameter so that a subsequent IF
subcommand in the Batch File can branch accordingly. FUNKY will optionally
execute some display formatting commands before it displays a prompt string.
The format of the FUNKY command line is shown below, with the usual convention
that items in brackets [ ] are optional.
FUNKY [ / [ c1 [ c2 ... ] ] / ] [ string ]
where c1, c2, etc are optional formatting commands enclosed in slashes.
These commands are executed in the order they are encountered, before the
string is displayed. The one-letter commands that are currently supported
include the following:
B or b Beep the console
L or l Skip one line
D or d Display a "delimiting" border across the screen.
After the "slash" commands are executed, the string is displayed. If no
slashes precede the string, the leading blanks and tabs are discarded. If
slashes were present, then all characters after the second slash are
displayed.
The only constraint on the string's characters is that "<", "|", and ">" must
not be used in the string.
Following the string, a reverse video "box" is displayed. When the user
responds with a keystroke, the box "un-reverses". Usually, extended keycodes
do not display on the screen.
FUNKY then returns to the Batch File with the errorlevel parameter set to the
extended code of the key that was struck. Representative examples of extended
keys are as follows:
59 - 68 Function keys F1 - F10 (base case)
71 Home
72 Cursor up arrow
73 Pg Up
75 Cursor left arrow
77 Cursor right arrow
79 End
80 Cursor down arrow
81 Pg Dn
If a key without an extended code (most alphanumeric and punctuation keys) is
typed, then FUNKY returns the following errorlevel codes:
0 If the key is ESC
255 For any other "non-extended" key
Let's return to Batch File execution and show a simple example of FUNKY and how
to test the errorlevel code with subsequent IF subcommands. We'll first
display the command lines in these comments, and then we will return to the
Batch File and execute the same command lines.
Here are the command lines:
echo F1 Batch Files are useful and increase productivity.
echo F2 Batch Files are unfathomable and a general pain.
echo F3 Batch Files are @#$%#$@% !!!
funky/llb/ Please select one of the above :
if not errorlevel 1 goto esc
if not errorlevel 59 goto below
if errorlevel 255 goto non_ext
if errorlevel 62 goto higher
if errorlevel 61 goto f3_typed
if errorlevel 60 goto f2_typed
echo You pressed F1. I find them useful, too!
goto continue
:esc
echo You struck ESC. Are you trying to sneak out?
goto continue
:below
echo You pressed a key with an extended code below 59.
goto continue
:non_ext
echo You pressed a non-extended key.
goto continue
:higher
echo You pressed a key with an extended code above 61.
goto continue
:f3_typed
echo Now, Now. It's not THAT bad.
goto continue
:f2_typed
echo Well, I felt that way until I wrote these utilities ...
:continue
You can't see the whole sequence now ( printing a listing of these tutorial
files for a guide helps ), but you probably have the idea. Let's go back to
Batch file execution and execute the command lines above. Here goes ...