Click here to Skip to main content
Click here to Skip to main content

EAN-13 BarCode ActiveX Control Drawer

, 25 Jun 2007 CPOL
Rate this:
Please Sign up or sign in to vote.
An activeX control that draws any EAN-13 barcode

Screenshot - BarCodeAX.jpg

Introduction

EAN-13, based upon the UPC-A standard, was implemented by the International Article Numbering Association (EAN) in Europe. This standard was implemented mostly because the UPC-A standard was not well-designed for international use. It was probably also implemented partly because no-one likes the U.S. to be in charge of anything, especially the Europeans.

Purpose of making it an ActiveX control

There was the need for some code to draw the EAN-13 barcode for an Oracle application. The solution came to be an ActiveX control that may be used anywhere it is registered on a computer, from any language and any environment.

EAN-13 code structure

A typical EAN-13 barcode looks something like this:

Screenshot - ean13-1.gif

Check the code for validity by the parity code, the 13th number

bool CEANBarCode::CheckCode()
{
    int Sum = 0;
    for(int i=2;i<=12;i+=2)
        Sum += GetAt(i) * 3;
    for(int i=1;i<=12;i+=2)
        Sum += GetAt(i);
    if(10-(Sum%10)==GetAt(13))
        return true;
    return false;
}

Then how are the numbers of the code being drawn?

Any number is being represented by a constant binary representation that is translated into white bar for 1 and black bar for 0. This constant is used as-is for the left part when the parity is odd, as a complement for the right part, and as reverse-order for the complement of the left part for even parity code.

Then EAN-13 is very simple

Thanks to the great reference, Barcode Island, which made me understand it very easily and contain more details about EAN-13.

Registering the OCX

You can register the OCX by running the following command:

regsvr32 "c:\BarCode.ocx"

Replace the path with the original path of the OCX.

UnRegistering the OCX

Simply by writing the previous line, but with the parameter /u as follows:

regsvr32 /u "c:\BarCode.ocx"

About regsvr32

The Windows tool for registering any self-registered objects such as COM objects. For more information, run the command:

regsvr32

History

  • 4 March, 2006 -- Original version posted
  • 10 March, 2006 -- Updated
  • 25 June, 2007 -- Article edited and moved to the main CodeProject.com article base

License

This article, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

Share

About the Author

Ahmad_Hashem
Web Developer
Egypt Egypt
C#
C++
GDI
MFC
ASP.NET

Comments and Discussions

 
QuestionHow should I use this control? PinmemberMCGRADYV516-Jul-13 22:19 
GeneralNice Control Pinmemberdnpro3-Jun-08 3:08 
GeneralError in code PinmemberKL Chin8-Mar-06 18:48 
GeneralRe: Error in code Pinmemberahmadaa10-Mar-06 4:28 

General General    News News    Suggestion Suggestion    Question Question    Bug Bug    Answer Answer    Joke Joke    Rant Rant    Admin Admin   

Use Ctrl+Left/Right to switch messages, Ctrl+Up/Down to switch threads, Ctrl+Shift+Left/Right to switch pages.

| Advertise | Privacy | Terms of Use | Mobile
Web01 | 2.8.141030.1 | Last Updated 25 Jun 2007
Article Copyright 2006 by Ahmad_Hashem
Everything else Copyright © CodeProject, 1999-2014
Layout: fixed | fluid