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From: brett:codeconscious at: 20-May-2001 11:22

Hi Frank, A couple of years ago I tried using twain with Powerbuilder. The only success I had was in using the EZTWAIN dll. EZTWAIN allows you to perform a scan with only a couple of steps. I wanted more control but I couldn't use the Twain API directly because doing so requires passing a function pointer from the client appliation to the Twain library. The function passed across is used by the library to notify your application of Twain events. Powerbuilder did not allow such a callback so I was caught. Eztwain handled the callback function by itself. As I said it has been a couple of years so things may have changed. Most likely though, you'll need to find out if Rebol will allow the call from the library. I'm sorry I cannot be of more help. When you work it out please let me know - I've got a couple of scanners here that it would be fun to operate using Rebol. :) The biggest question I have though is that callback issue. Brett.