Parallel Port and VB.NET

[Hallie]

Hi all,


I am trying to write a program which will send data to the parallel port and light up some LEDs. I dun have problem on the programming part( i think) as i can send data to the parallel port. The problem is, when i send 0(zero) to the port, all LEDs is suppose to be OFF, but the first 3 LEDs still ON.

If you don't understand what am i talking about please visit http://www.codeproject.com/csharp/csppleds.asp

p/s: i dunno where to post this problem, so i post it here. any idea or solution are welcome ^^

Thank you in advanced

Hallie

[Andy_P]

What happens when you send &hFF? Do all the LED's come on?

Do the first three ever go off, whatever code you send?

Try sending codes of &H1, &H2, &H4, &H8, etc, to bring on one individual LED at a time.

Of course, it may be a wiring fault. Hope you haven't fried your parallel port.

[Hallie]

Yea, whatever code i send to it, the first three LED will light up.
I've been using that same old parallel port with my printer, no prob