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CHOICE.LXB is a program you can create which will display a list of things you can do with any data file.


;CHOICE.LXB // The semicolon is the LXB comment marker.

screensetup // LXB command to put the palmtop in graphics mode

upper *ext %1 // Gets commandline arguments (%1 and %2) ,

upper *fqn %2 // converts them to uppercase and stores them in

// LXB global variables.

goto @ext@ // Jump to the section of the code that deals with

// files that have the extension stored in @ext@


;Global subroutines:can be used by several types of files


:WIN //A label for a subroutine

screensetup Choices for @fqn@ //Show the name of the file

RETURN //at the top of the screen.


winopen 280 80 360 110 One //"One Moment" message in a

windisplay 10 1 2 Moment //small two-line window


:SELECT //Pick a new file with the

//extension given in @ext@

Dirbrowse *aFile *.@ext@ Choose a different *.@ext@ file

//Dirbrowse puts a directory

//browser on the screen. It lets

//you select different drives,

//directories and only those files

//with the extension in @ext@. Once

//you've picked a file, its name

//will be stored in the *aFile


if "@afile@" == "" goto skip //Test for the case when no file

//was selected otherwise goto :SKIP.

set *fqn @aFile@ //Copy the @aFile@ variable to the

//*fqn variable for further use.


goto @ext@ //Return to sender...


;Compressed files menu




gosub win // execute ":WIN"

menu "&List all files" "&Test all files" "&View a text file" "&Extract a file" "&Pick a New File" &Quit

onerrorgoto end list@ext@ test@ext@ view@ext@ extract@ext@ select end

// "menu" is a LXB command.

// If a menu item is more than one

// word, enclose it in quotes.

// Use "&" before any "hot key".

// "onerrorgoto" is a LXB command.

// The first choice should be a way

// to exit via the ESC key. The second

// option refers to the first item in

// the menu list; the third option

// refers to the second item in the

// list and so on. All items refer to

// the routines below except for

// "Pick a New File" which refers to

// the ":SELECT" routine shown above.

// NOTE: you can concatenate an LXB

// variable to another word as in

// "list@ext@" (Neat feature!)

:LISTLZH // CHOICES to show a list of files

:LISTZIP // in a compressed file....

gosub 1MNT // run the ":1MNT" subroutine

if "@ext@" == "LZH" lha l /n @fqn@ >filelist

// i.e. if the extension is "LZH"

// run the LHA program on the

// given .LZH file (shown as @fqn@)

// and send the list to a file called

// "filelist" using the DOS I/O

// redirection operator ( > ).

if "@ext@" == "ZIP" fv @fqn@ >filelist

// If the extension is .ZIP, use

// Vernon Buerg's FV.COM program to

// send a list of files to the

// "filelist" file.

FileDisplay filelist // "FileDisplay" is a LXB command

// that displays any text file in

// an onscreen window.

del filelist // Erase the filelist file when

// you're done with it.

goto @ext@ // Loop back to the start of the

// Menu routine.

:TESTLZH // Routines to test the integrity

:TESTZIP // of a compressed file.

gosub 1MNT

if "@ext@" == "ZIP" goto ziptest

// If the extension is ZIP jump to the

// next section, otherwise set the

screenrestore // screen to text mode

lha t @fqn@ // Use the LHA program to test the

// .LZH file and show it on the screen.


screensetup // Set graphics mode.

goto @ext@ // Loop back to the menu.


pkunzip -t @fqn@ > filelist // Send the test results to

// "filelist" and

FileDisplay filelist // display the results.

del filelist

goto @ext@ // Loop back

:VIEWLZH // Routines to view a single file

:VIEWZIP // in a compressed file.

input *vufile "Which file? "

// "input" is a LXB command that

// asks for the name of a file and

// stores the name in a LXB variable

// I named *vufile.

if "@vufile@" == "" goto @ext@ // Test for no input

// otherwise...

gosub 1MNT

if "@ext@" == "LZH" lha e /n @fqn@ @vufile@

if "@ext@" == "ZIP" pkunzip -e @fqn@ @vufile@ >nul

// Extract the vufile from the

// compressed file.

Filedisplay @vufile@ // Display the file.

del @vufile@ // Erase the temporary file.

set *vufile "" // Reset the *vufile variable

goto @ext@

:EXTRACTLZH // File extraction routines


input *vufile "Which file? "

if "@vufile@" == "" goto @ext@

gosub 1mnt

if "@ext@" == "LZH" lha x /n @fqn@ @vufile@

if "@ext@" == "ZIP" pkunzip -e @fqn@ @vufile@

// The extraction process will

// clutter the display, so

screenrestore // switch in and out of text mode

screensetup // to refresh the screen.

goto @ext@


screenrestore //Restore the screen and stop


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