Is there a way for me to continue acquiring documents from the AcquireFinished handler?  I would like to prompt the user "Scanning Complete?".  I would like for them to be able to answer "No" and scan more pages.

 Thank you!

Karen

I was able to accomplish this by adding a variable, 'acquireFinished'; initialized to false.

I set Device.ModalAcquire = true and added a loop around Device.Acquire:
dev.ModalAcquire;
while (!acquireFinished)
   dev.Acquire();

In the AcquiredFinished handler I ask the user if they are finished scanning.  If they answer yes, 'acquireFinished' is set to true and the loop is exited.  If they answer no, 'acquireFinished' is set to false and the loop is executed again.

This is a really useful solution for me. However when I scan with

Andy, 

When the cancel button on the scanner dialog is clicked, you will get an AcquireCanceled event.

Is this a TWAIN driver or a WIA driver?  With WIA you might have issues because it doesn't follow the same rules as TWAIN.

1. Make sure you are using the latest version of DotTwain.

2. If you have this problem using the latest version, open a support case and provide a simple project that duplicates your problem.  Also give us the name of the driver you are testing with.

Thanks for the pointer Glen. Cancelling while scanning will trigger the AcquireCanceled event, however if I press cancel without having started scanning, none of the events get triggered for me to catch. I'm using a TWAIN scanner driver, and the version of DotTwain that came with Document Dot Image 4.0.

 I might investigate the newly released Dot Twain :)

Cheers

Andy

I have the same trouble too. Very frustrating.

Using dotimage 5.

The cancel event is never fired if I press cancel without having started scanning.

I've tested with multiple scanners and clicking the cancel button in the scanner dialog works for all of them.  For a sanity check I just tested again with 3 devices using the last release of 5.0 and they all work.

Test your scanner with the Acquisition demo source code provided with the installer.  Put a break point in the  acquisition_AcquireCanceled method to see if it hits.  If it doesn't, then it's a problem with your driver.  You can have DotTwain create a trace log (http://www.atalasoft.com/KB/article.aspx?id=10027) to see what your driver is doing.