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barcode reader programming

Posted on 2000-05-02
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I am attempting to write a program  to interface   with  a barcode  scanner.  The PC  in this  

case  is  a small  handheld  unit  made  by  Touchstar  and  runs  the DOS  OS.  I have  been

supplied  library  files  and  sample  .exes as  well as  source  code from TouchStar  for this

particular unit.   To further complicate things, ...the development  tool I am using  is  called  

Mobile Builder 2.0  by  Penright!  corporation.   It  is a C-based  development  tool especially

for handheld computers and  has  lots  of extras for things  like signature capture and uploading  

and  downloading  the  databases that it creates. But  it  uses the M$  Visual C++ 1.5/5.0

compilers to compile.

   Now for the problem,....I am  not  skilled  enough to determine what I have codewise,  nor

skilled enough to begin from scratch.  I am fairly proficient  at  using  the Penright! IDE  to  

build forms,  and  move back and  forth between them, and  some  basic  DB  type things,  but  

not  hardware ! Penright  is Object  Oriented, so  my  goal  is for the user to click  a button  

on the form (a scan button)  and  then be able to scan barcodes with the built in scanner.  Heres  

what  I desire  from the Experts  at EE:

#1.  How do I add the working C code, sent to me , to a button click event inside another program

( also a C program )  Here  is an  example of the Mobile Builder  Code,


BEGIN_EVENT_MAP(frmIntro)
    ON_CTL_EVENT(CtlSelect, btnScan, OnbtnScanCtlSelect)
END_EVENT_MAP()



static BOOLEAN OnbtnScanCtlSelect(EVENTTYPE *pEvent, WORD *pError)
{
      // perform default processing
      DefaultHandler(pEvent, pError);

      // added by CodeAssistant
      //***** here is where I assume  my  code  will need to be

      // return TRUE to continue event routing {{MB1}}
      return(TRUE);
}


#2 Everytime  I start trying to include  the files  in the sample  code into my project,  there  

are  literally  hundreds of  errors  referring to "C:\WINNT\Profiles\Dave\Desktop\creg.h(2) :

error C4226: nonstandard extension used : 'far' is an obsolete keyword" (  this  did  not happen  

with  Borland C++ Builder,  but  I only  tried  that  once,  I know  even less about

Borland...but the guy  swears  this code  is for M$ )  How can I get past this?
 
A copy  of the working barcode scan code that I need to integrate, is posted at this site

http://samhell.com/~intelligrow/scanners.txt     please  feel free to look it over  and  see  how  

I can integrate it  into the above event code   .....  please  explain  all areas of your  

suggestions  and  comments  as  you can  see  I am in way over  my  head  and  can  use  all help

and  assistance.  All  comments  and  suggestions  are  welcomed  and appreciated.


DaveMon
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Question by:DaveMon
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LVL 14

Expert Comment

by:AlexVirochovsky
ID: 2776170
DaveMon, i see some strange thing: you want make something for DOS, but BCB makes only Windows apps. How it?
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Author Comment

by:DaveMon
ID: 2777061


See,  I am  totally  inexperienced  in BCB,  and  was  unaware  of  that.  Do you think the errors  are  caused  by  the  version  of  compiler  I'm  using?  Penright  allows  me  to  select  either  my   C++1.5  or  C++5.0   compilers,   as  well  as  any  installed  Borland compilers (  Which  I now  know  may  only  be  used  on  Win16/32  apps,  corect?


DaveMon
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LVL 2

Author Comment

by:DaveMon
ID: 2777090
Also,   be  sure  to look  at  my  link  using   netscape....( if  it   does  not  look  like  readable  code otherwise....in  Netscape  it   is  easily  read.


DaveMon
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LVL 14

Expert Comment

by:AlexVirochovsky
ID: 2777237
I saw code: of cource, it is DOS, but BCB don't supports DOS. You must
use some compiler, that suppors DOS.
If you haven't this guy, you can now (free) download  BC 5.1
http://community.borland.com/article/0,1410,20633,00.html 

About you problems:
1.
BEGIN_EVENT_MAP(frmIntro)
    ON_CTL_EVENT(CtlSelect, btnScan, OnbtnScanCtlSelect)
END_EVENT_MAP()
This is part of code with using MFC for
Visulal C of MS (and you can't use it
in  DOS apps).
2. "far is absolete..."-> seem me,it is becouse you try translate MFC text with any Boorland Compliler(only in BC 5.x with flag MFC you can make it). For detect write need see creg.h


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Author Comment

by:DaveMon
ID: 2777440


Actually  Im  trying  to compile  with  MS C++ 1.5 I do have a copy of BCB  and I compiled once  with  it  just  for troubleshooting purposes.  The code BEGIN_EVENT_MAP(frmIntro)
    ON_CTL_EVENT(CtlSelect, btnScan, OnbtnScanCtlSelect)
END_EVENT_MAP()
is  actually generated by  the MobileBuilder IDE  ( I am  only  required  to  create the code  near  where  my  note  about  my  code  is.

Here  is creg.h
////////////////////////////

void far creg (int reg, int value);
void far int3 ();

int far cart_inpb (int index);
int far cart_inpw (int index);
void far cart_outpb (int index, int val);
void far cart_outpw (int index, int val);
int far cart_last_outpb (int index);
int far cart_last_outpw (int index);
////////////////////////////////////

Thanks  for  you  help


DaveMon
0
 
LVL 2

Author Comment

by:DaveMon
ID: 2777532


Additionally,  there  are  two API exe programs  that  must  be loaded running  on the  PC  before  a MobileBuilder exe  program can run....(  I assume  these do the touchscreen functions  as well  as  the signature  capture  features )  This  might  explain  why there  are  things thatlook  like  they  would  not  work  on a  pure  DOS  program.


DaveMon
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LVL 14

Accepted Solution

by:
AlexVirochovsky earned 300 total points
ID: 2778289
i don't see something wrong in creg.h,
exepting one thing: far is obsolet(in BCB all far), and you can tray delete all "far".
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Author Comment

by:DaveMon
ID: 2778621


Do you mean that the word  far   is  now  obsolete  in  all  C  code?  I dont  really  use  borland  at  all....so   should  I just  delete  the  words  far  from the  code?


DaveMon
0
 
LVL 14

Expert Comment

by:AlexVirochovsky
ID: 2780117
What do you use?
0
 
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Author Comment

by:DaveMon
ID: 2780614
M$ Visual C++ 1.5
0
 
LVL 14

Expert Comment

by:AlexVirochovsky
ID: 2781758
O, with this compiler i can't help.
I work with all BC, but not VC, sorry.
0
 
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Author Comment

by:DaveMon
ID: 2797966
Thanks  Alex  I appreciate your assistance.......
0

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