The ^HW command is used for this purpose which returns to the host the requested directory list in predefined format. I can use it in ZSU from "Open Communication With Printer" button in Direct Communication window. There are several command which similar to ^HW has response to the host from the printer.
Could somebody help us how can these command be used in Windows 7 environment through Windows printer driver? We developed .NET C# a program which communicates with the printer through printer driver. Do we need direct USB communication between our program and the printer? If yes, is somewhere sample code?
Is there any sample code what we could use in bi-directional printer communication?
Thanks for any useful feedback.