cheers enrico When I tell somebody to RTFM or STFW I usually have the page open in another tab/window of my browser, so that I am sure that the information requested can be reached with a very small effort
x means hex so it is passing a hex string in, character format, to C2X and is getting the hex representation back i.e. 2 bytes padded with leading zeros but in readable (character) format. Probably a bad use of C2X and possibly not one that was envisaged by Mike Cowlishaw - althoough it does not break the interpreter.
The problem I have is that people can explain things quickly but I can only comprehend slowly. Regards Nic