How to intercept a job sent for printing in order to then "interpret" it into a .prn file for a specific printer?

Question

Seal

Hello.
There is a program from which tickets are printed on a specific thermal printer for tickets. In the settings of the program there is no so-called. ctrl-p that is, there are no print settings and printer selection. I need to somehow intercept the print job to this printer (in devices it is like a printer - and this job flickers in the print manager) - and see how this job will look like exactly in the form of a .prn file, in order to print to the printer from another, third-party program , Similarly. Another program just knows how to send printac by batch file only, prn files. I need a template for this file.. let's just say.
How to intercept print job on prnak and interpret it into .prn file?
Thank you.

Answer 1

In the settings of the program there is no so-called. ctrl-p that is, there are no print settings and printer selection.

Default printer properties.

Answer 2

Mneee ..
Take a virtual machine, put a venda on it, create a virtual LPT port, in venda set up a printer on this port. And on the host system, direct this port to a file. Perhaps something will work. Or maybe it won't work.

Answer 3

What is a prn file in your understanding? I have come across many variations of prn files.
I suspect that the program prints either to the default printer or directly to a specific port (LPT / COM). This usually happens this way, although there may be other options.
Install some virtual printer on the system that writes to a file and either make it the default printer or connect to the desired port (share the printer and use net use to connect its printer to the port).