C# LPT Name problem

Question

How can I send output to LPT in C#. I use SerialPort class. I set port name to "LPT1" and I'm getting this error.

The given port name does not start with COM/com or does not resolve to a valid serial port. Parameter name: portName

What to do?

LPT ports aren't serial ports, they're parallel ports. You'll need to find a different class. — Mark Ransom, Jan 05 '11 at 17:33

score 6 · Accepted Answer · answered Jan 05 '11 at 17:34

6

You can't use SerialPort to access a Parallel Port. This will require P/Invoke to inpout32.dll to access. For details, see this tutorial.

answered Jan 05 '11 at 17:34

Reed Copsey

1 Answers1