DynaRithmic TWAIN Library version (DTWAIN) 4.3 (Demo Version)
32-bit ANSI and 32-bit Unicode versions of DTWAIN are included in the Demo package, giving you up to 60 days of trial usage (30 days for 32-bit DTWAIN ANSI Version, 30 days for DTWAIN Unicode usage)
If acquiring to files, the following file types
TIFF (no compression)
TIFF (Group 4 compression)
Job control is not available.
All other features are enabled in the trial version.
DynaRithmic TWAIN Library (DTWAIN) 3.3 (Free Version)
The Free version of DTWAIN is a stripped down version of the retail version of DTWAIN. There is no time-limit on the free version of DTWAIN.
The DTWAIN free version has the following limitations.
DTWAIN DLL Free Version cannot be used in a commercial, shareware, or public domain. Usage is limited to personal or in-house use.
When the DTWAIN DLL is initially loaded, a message box appears reminding you or your users that they are using a version of DTWAIN that is for personal or in-house use only. The same message box appears once an acquisition starts.
Acquisitions are limited to single pages (no multi-page support).
TWAIN Data Source is closed after each acquisition.
Native Mode acquisitions are supported. Buffered mode is not supported. File mode is supported, but only BMP files can be generated.
Default TWAIN source capability values are supported (the application cannot set capabilities). The only settings that are changeable are resolution, contrast, and brightness.
A source can only be selected using the TWAIN Select Source dialog.
The Source User Interface must be used when acquiring images.
TWAIN Message Loop Interception is not supported (must use DTWAIN Modal loop acquisitions)
Imprinter and Duplex options are not supported.
To summarize, you can acquire only single pages, and only to BMP files if acquiring to a file. If you call a function that is not supported, or call a function with unsupported options, a message box will appear stating that the function is not supported.
For the DTWAIN_AcquireFile or DTWAIN_AcquireFileEx functions, the only type that is accepted in the Personal Edition is the DTWAIN_BMP (a Windows BMP) file type. If another type is specified, DTWAIN_AcquireFile(Ex) will return 0 and no acquisition will occur.