Paul McKenzie comments

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                                            Paul McKenzie

On a scanner with an automatic document feeder, if the message notification is turned on and a paper jam occurs during the scanning process, the DTWAIN_TN_PAGEFAILED code will be received, but the message notification callback keeps being called

I made some changes to the DTWAIN_TN_PAGEFAILED notification and placed them in the development branch. Please try the development DLL's available [here for 32-bit](https://github.com/dynarithmic/twain_library_source/tree/development/binaries/32bit) and [here for 64bit](https://github.com/dynarithmic/twain_library_source/tree/development/binaries/64bit). As to...

How to set up Paper ejection direction?

I am not sure I know what "paper ejection" means, but it does not sound like a standard TWAIN capability. 1) What is the name of the device? 2) If...

On a scanner with an automatic document feeder, if the message notification is turned on and a paper jam occurs during the scanning process, the DTWAIN_TN_PAGEFAILED code will be received, but the message notification callback keeps being called

Also, I highly suggest that you not attempt anything after the paper jam, as the behavior is highly dependent on how your driver handles paper jams when something occurs. In...

How to set up Paper ejection direction?

If you run the [DTWDEMO.exe](https://github.com/dynarithmic/twain_library/tree/master/binaries/32bit) program that is in the demo .zip file, you can select the source, and get a listing of the capabilities if you choose **Source Properties...**...

How to set up Paper ejection direction?

DTWAIN does not know what those capabilities do, what data type they are (string, booleans, integers, etc.), and whether they can be set (some may be read-only). You will need...

How to set up Paper ejection direction?

See [DTWAIN_GetCapValuesEx2](https://www.dynarithmic.com/onlinehelp/dtwain/newversion/DTWAIN_GetCapValuesEx2.html). This gives you detailed information on how to properly get the cap values, once you get the information about the capability.

How to set up Paper ejection direction?

[Make sure you are using the latest version of DTWAIN](https://github.com/dynarithmic/twain_library/releases), as many changes have occurred since then. You can also try the new `DTWAIN_TestGetCaps` introduced in version 5.5.0 (see the...

how to stop or terminate the scan

Not clear what you are asking, but if your goal is to stop the feeder, you can set up the application to get the DTWAIN_TN_PAGECONTINUE notification, and return 0 or...

how to stop or terminate the scan

Yes, DTWAIN_TN_PAGECONTINUE is sent to the application by DTWAIN. You need to respond to it by returning the desired value. By default (returning a 1), it does nothing, but returning...

how to stop or terminate the scan

The DG_CONTROL / DAT_PENDINGXFERS / MSG_RESET will be automatically done if DTWAIN_TN_PAGECONTINUE is returned 0. Also, in general, you are free to call any TWAIN triplet by using [DTWAIN_CallDSMProc](https://www.dynarithmic.com/onlinehelp/dtwain/newversion/DTWAIN_CallDSMProc.html). But...