Why? The majority of the scanner device vendors (HP, Fujitsu, Canon, etc) provide 32bit TWAIN drivers only - thus most scanners will not be accessible in 64bit DSM. A naive solution will be copying over the 64bit DSM dllĪnd link 64bit applications to it. TWAIN Working Group provides both 32bit and 64bit data source managers (DSM).īy default, Windows OS (from XP to Window 10) ships only the 32bit DSM dll. The Reason Why TWAIN Scanners Don't Show Up in 64-Bit Applications Many developers share their disappointments over poor support of TWAIN on 64bit OS all over the tech forums.īelow will explain the cause of the problem and propose a solution.
Solution to the Problem: 64-bit Applications Unable to Access TWAIN WIA Scanners on 64bit OSĦ4bit applications (for example, C# VB.NET WinForms WPF and Java Swing JavaFX applications) become more and more common, the fact that most TWAIN scanners are not accessible to 64bit applications makes
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