In my software I am blocking printing to a file or any other devices, allowing only real printers?
Most printers are printing to DOT4_001, one of the users send me an email complaining that his printer is not printing from my software. I dicovered that he is printing to port USB003.
I tested it, if the computer has two printers (A) and (B)
If the port for printer (A) is USB003 and changed to DOT4_001 port then printer (B) is receiving the print order.
Why some printers use DOT4_001 and some uses USB003?
is it necessary to have a port for each printer? or
Is there away to make all printers print using DOT4_001? (one port)