twain_32.dll version => 1.8

[alexkruv]

Hi all, 🙂
>>
>> I have a problem (CAP_DEVICEEVENT is unsuported) in programming the TWAIN interface for HP Scanjet 7800 .Maybe 🙄 I need to upgrade TWAIN_32.DLL to version 1.8 as later ? ❓ .
>>
>> Please can someone point me to a location for this file.

[dpenney]

alexkruv wrote:

… I have a problem (CAP_DEVICEEVENT is unsuported) …Maybe I need to upgrade TWAIN_32.DLL to version 1.8 as later ?…

A newer TWAIN DLL will not solve the problem. The Data Source Manager (TWAIN_32.DLL) is merely the middle man in capability negotiation.

CAP_DEVICEEVENT can only be supported by a Data Source (HP’s in your case). From your post it appears HP has chosen to not support it. According to the TWAIN specification, CAP_DEVICEEVENT is not a required capability.

What event are you attempting handle? Maybe there’s another solution to the problem you’re having.

[Author]

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