Printing Code 128 C barcode using C++ code interacting with OPOS Common Controls 1.8

Hi,

I'm trying to print Code 128 C type barcode (as type A/B would be too wide for my requirements) through Epson TM-H6000III receipt printer using OPOS Common Controls 1.8. My code is written in C++.

Normally, I print the barcode using the following code snippet:

Code:

---

 
const LONG PTR_BCS_Code128 = 110;
lOposBarcodeType = PTR_BCS_Code128;
lReturn = m_PosPrinter.PrintBarCode(2,*lpszTextline,lOposBarcodeType,120,5,PTR_BC_CENTER,PTR_BC_TEXT_BELOW);

---

Here, *lpszTextline represents the data to be printed as barcode.

From suggestions found online, I tried to make the following changes to print the barcode in Code 128 C format:

Code:

---

 
const LONG PTR_BCS_Code128_Parsed = 123;
lOposBarcodeType = PTR_BCS_Code128_Parsed;
lReturn = m_PosPrinter.PrintBarCode(2,*lpszTextline,lOposBarcodeType,120,5,PTR_BC_CENTER,PTR_BC_TEXT_BELOW);

---

and tried to format the barcode data in various ways:

- Leading "{C"
- Leading "{C", trailing "H"
- Making no. of characters in the data even

But none of the ways worked. It always resulted in OPOS_E_ILLEGAL error with ResultCodeExtended = 300003. I cannot find more information about the extended code in the Internet either.

Any help in this regard will be highly appreciated.

Thanks in advance.
<Real name not allowed> :p

Hi

Your problem may be realted to the type of date you are trying to encode.

Code128C can only strictly be used with an even number of numeric digits, because it encodes pair of digits as a single bar code element i.e. it is a double-density barcode.

If there is an uneven number of digits or if the data includes non-numeric digits, then Code128Auto is used to create a composite subsets i.e.

12345678 will be pure Code128b

123456789 will be encoded as follows Subset B "1" then Subset C "23456789"

Of if data contains non numeric digits - 12345A will be encoded as follow Subset B "1" Subset C "2345" Subset B "A"

Not sure if this helps.

Regards

Rob
www(dot)tantolabels(dot)com
Barcode Label Printing

Quote:

---

Originally Posted by coolprosu

Hi,



I'm trying to print Code 128 C type barcode (as type A/B would be too wide for my requirements) through Epson TM-H6000III receipt printer using OPOS Common Controls 1.8. My code is written in C++.

Normally, I print the barcode using the following code snippet:

Code:

---

 
const LONG PTR_BCS_Code128 = 110;
lOposBarcodeType = PTR_BCS_Code128;
lReturn = m_PosPrinter.PrintBarCode(2,*lpszTextline,lOposBarcodeType,120,5,PTR_BC_CENTER,PTR_BC_TEXT_BELOW);

---

Here, *lpszTextline represents the data to be printed as barcode.

From suggestions found online, I tried to make the following changes to print the barcode in Code 128 C format:

Code:

---

 
const LONG PTR_BCS_Code128_Parsed = 123;
lOposBarcodeType = PTR_BCS_Code128_Parsed;
lReturn = m_PosPrinter.PrintBarCode(2,*lpszTextline,lOposBarcodeType,120,5,PTR_BC_CENTER,PTR_BC_TEXT_BELOW);

---

and tried to format the barcode data in various ways:

- Leading "{C"
- Leading "{C", trailing "H"
- Making no. of characters in the data even

But none of the ways worked. It always resulted in OPOS_E_ILLEGAL error with ResultCodeExtended = 300003. I cannot find more information about the extended code in the Internet either.

Any help in this regard will be highly appreciated.

Thanks in advance.
<Real name not allowed> :p

---

Hi Rob,

Thanks for your reply. The barcode I'm trying to print has numeric only data and I have ensured it consists of even no. of digits. Infact the no. of digits in the barcode I'm trying to print always remains the same.

However I realized the real problem behind the error I was getting. From OposPtr.h code I Googled, I found the PTR_BCS_Code128_Parsed constant was introduced in CCO 1.8. The environment I'm in has 1.7 installed in it. The environment can't be changed easily as it involves deployment and hardware driver compatibility issues.

So the question remains, is there a way to FORCE printing of type C 128 barcode with my numeric only data containing even no. of digits?

Regards,
cool

Hi Cool

I'm not a programmer, more an expert in barcodes and barcode printing.

If it's the Epson code you need to generate the Code128c barcode, try this.

Download Seagull Scientific Bartender[from www(dot)seagullscientific(dot)com/aspx/free-bar-code-label-printing-software-download(dot)aspx] and install it under 30-day free of charge trial.

Then download the windows driver for your Epson printer.

Create your code128c barcode in bartender (you can force subset C in bartender)

Then print to the epson printer, it produces the correct barcode then print again but this time use "print-to-file" rather than the printer itself, and you should get a text file containing all of the text strings used to create the barcode

Not sure if this will help of not.

Regards

Rob

Plain, Printed and Barcode Labels[www(dot)tantolabels(dot)com]

Quote:

---

Originally Posted by coolprosu

Hi Rob,

Thanks for your reply. The barcode I'm trying to print has numeric only data and I have ensured it consists of even no. of digits. Infact the no. of digits in the barcode I'm trying to print always remains the same.

However I realized the real problem behind the error I was getting. From OposPtr.h code I Googled, I found the PTR_BCS_Code128_Parsed constant was introduced in CCO 1.8. The environment I'm in has 1.7 installed in it. The environment can't be changed easily as it involves deployment and hardware driver compatibility issues.

So the question remains, is there a way to FORCE printing of type C 128 barcode with my numeric only data containing even no. of digits?

Regards,
cool

---

I have never generated barcodes in C++. But I am now generaing Code 128 barcode in C# with a barcode generator. You may try to find professional passages on this site.