Home › Forums › TWAIN Classic › How to activate the backlight in HP 4890 scanner › Reply To: How to activate the backlight in HP 4890 scanner
October 25, 2006 at 6:58 am #23524
Thanks for responce, hpb. Do you have “inside information” ? 😉 ( You seems to know more about this than HP support in my country )
Actually, what I might do is to use a usb-sniffer and try to find out how the backlight is activated by the UI.
I have 20y programming experience, but have not worked with the USB interface before. Do you see any reason why such an approach would be -impossible- ?
Eh… maybe.. do you have more info about bugs in the TWAIN interface ?? So I don’t have to find out the hard way :). I have found at least one more case where the interface breaks the spec.
John Rehn