Hello, I am looking for a parallel port sniffer that let me capture all data transferred through the port (in and out). I am using a paralel scanner and want to trap data before it reaches the twain driver. I used PortMon, but it refuses to show the bytes transmitted or received from the device. Moreover, it says it doesnt trap every byte in the stream, just the events and some bytes. I can use the same scanner with an USB adaptor, and Snoop (a USB sniffer) also looses about 1/4 of the bytes transferred. Is possible to sniff all data traffic through the ports, or I am asking something impossible? Is thjer any application I can use. Thanks Alejandro aleparise@hotmail.com