[WinPrnDev] Intercepting data sent to the printer


I am working with an application that prints to a thermal POS printers in
windows environment.
Can somebody please tell me how can I get the actual text(readable) after a
print command is fired from that application. I have no control over the
code of that application therefore I want to do it at the spooler level or
at the driver level , or some how interpret  the data  flowing through the
COM port.


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