My laptop doesn't have a parallel port so I purchased a USB to parallel convertor. I wrote a program which sends data to the parallel port to turn on some LEDS and it works ok on a PC with a built in parallel port but it wont work on my laptop with the USB to Parallel convertor. I used the delphi parallel port driver inpout32.dll which I found at http://www.sixca.com/eng/articles/pardel/index.html
Typical use is shown below....
procedure TForm1.Button1Click(Sender: TObject);
Out32($378,$0f); //send $0f to parallel port
Does anyone know why the above code will not work with a USB to parallel convertor?