Kbase P17587: How to switch Lexmark Forms printer to bar code printing mode?
| Autor |
Progress Software Corporation - Progress |
| Acesso |
Público |
| Publicação |
15/10/2008 |
|
Status: Verified
FACT(s) (Environment):
Progress 9.1D
SYMPTOM(s):
Unable to print bar code on Lexmark "Forms Printer" using Progress 4GL.
Can print barcode on same printer using Fox Pro.
Code entails sending a "Barcode Setup Command"; an escape control codes sequence; to start the bar code printing mode.
CAUSE:
The Barcode Setup Command escape control sequence for the Lexmark "Forms Printer 248x/249x" family requires the output of the null character. The code was using the Progress 4GL statement:
PUT CONTROL CHR(0).
to output the null character. Changing the above statement to:
PUT CONTROL NULL.
resolves this issue.
FIX:
According to the Lexmark “Forms Printer 248x/249x Technical Reference”, the "Barcode Setup Command" syntax requires sending a string containing the NULL character CHR(0) to the printer. To send the null character to the printer from the Progress 4GL, use the statement:
PUT CONTROL NULL.
For programming details of this printer family, consult its "Technical Reference" document at:
http://www.lexmark.com/publications/pdfs/form2400/en/enTref.pdf