I need to add TWAIN scanning to an Delphi application and am having trouble

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Asked: May 13, 20262026-05-13T12:02:14+00:00 2026-05-13T12:02:14+00:00

I need to add TWAIN scanning to an Delphi application and am having trouble

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I need to add TWAIN scanning to an Delphi application and am having trouble locating an off-the-shelf component to do so.

I downloaded TDelphiTwain but, when used in D2010 on Windows Vista, it does not appear to recognize any Twain sources on my system. I also tried the trial version of Twain Toolkit for Delphi from MCM which has the advantage of being currently updated (DelphiTwain’s last update was 2004), but the Twain Toolkit will not even compile on my system (I think some of the DCUs are out of date).

Can anyone suggest a simple method of getting TWAIN scanning into my Delphi application?

UPDATE: Using vcldeveloper’s update to DelphiTwain (see below) I was able to get this working. Also, I also discovered that Envision Image Library supports Twain scanning as well as assisting in handling multi-page TIFFs, and has been updated for compatibility with D2010.

Late Breaking UPDATE VCLDeveloper’s code, below, works fine. However, I settled on Envision library which includes the ability to easily create multi-page TIFF files. I got the Envision scanning, including multi-page file handling, implemented in a few hours.