Consult a Delphi print problem, printer ports is as follows:
I use Assignfile (RPrinter, 'lpt3');//set the printer
Rewrite (RPrinter);//to write file
Writeln (RPrinter, ");
Writeln (RPrinter, ");
Always can't print, this way to ask how this print port Settings? Now the printer to print time is to use the lpt3 port on the bottom of the test page prints out ok, how to write programs that can point to the ESDPRT002 lpt3 this port, the zha write programs, please