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TWAIN_32.DLL

 [1/6] from: fsievert::uos::de at: 19-May-2001 17:01


Hi! I want to use the twain dll with /Pro, has anyone already tried this and can give me an example? Thanks, Frank

 [2/6] from: ptretter:charter at: 19-May-2001 10:16


Is there any free subscriptions to find the functions of dll's? Paul Tretter

 [3/6] from: gjones05:mail:orion at: 19-May-2001 11:10


> From: "Frank Sievertsen" > > I want to use the twain dll with /Pro, has anyone already tried this
and
> > can give me an example?
Hi, Frank, I can't be of direct help to you, but here is a nice pdf resource through: http://www.wotsit.org The actual link: http://www.wotsit.org/download.asp?f=twain18 .. and ... From: "Paul Tretter"
> Is there any free subscriptions to find the functions of dll's?
Hi, Paul, If you "just" need a listing of the functions, in Win 9* you can right click a dll file name and choose QuickView to find out the function interface names. No parameters though, so this is of little significant benefit. For what it's worth... --Scott Jones

 [4/6] 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.

 [5/6] from: fsievert:uos at: 20-May-2001 10:26


Thank you and the others for your help. I had some looks at the TWAIN Spec, but I did not see any function-pointer passed from the application. (Maybe this has changed?) The event-loop starts with this: while (GetMessage ( (LPMSG) &msg, NULL, 0, 0) ) { I want to use TWAIN to get images from my webcam. I will have a look at EZTWAIN, maybe it is good enough for this purpose. Thanks, Frank On Sun, 20 May 2001, Brett Handley wrote:

 [6/6] from: fsievert:uos at: 21-May-2001 12:42


I've tested EZTWAIN, it is really easy, thanks for the tip. Unfortunatly the twain-driver for my webcam seems to fail when I am using multi-transfer-mode. So I have to open source, get an image and close it do all again. So the speed is very poor. (1 Picture per 3 seconds). :( But I will try some more. Thanks, Frank On Sun, 20 May 2001, Brett Handley wrote: