Responding to a printer status query from a device that connects to serial printers.

Question

I have written a program to emulate a serial printer in C#.  My program uses the SerialPort class and connects to devices through a COM port. The program works fine with devices that just print and don't query the printer status.
However, if a device does check for "printer status online" it stops trying to print as it thinks the printer is offline.
My question is, how do I have my program respond to a printer status query from a device?
Microsofts Hyperterminal does this somehow.  As soon as I close my program and then fire up Microsofts Hyperterminal the device will read "Printer status online".

Answer 1

Nevermind. I figured it out. I just needed to enable flow control in my app. I just assumed the device was querying the app.