Barcode type determination in print control

Question: How would I know what barcode type a specifc program is using without sapscript or smartforms? The program is using print-control functions and I have a hunch that this- 'D102050' is the barcode being used. What does 'D102050' mean?

Thanks

Answer:
I forgot to mention that the program only uses SESCP (escape character) print-control function. It does not use the actual Barcode print-control functions defined in SPAD.
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