Product and Development Musings

ImageMan.Net Twain Version 3 is now shipping

10. January 2011 07:33

The next release of our ImageMan.Net Twain toolkit is now available for downloading. Despite the major new functionality this is a free update to existing licensed users. The installation can be downloaded from the My Products page or from the Trial Downloads page.

Among the major new features are:

  • Support for 32 & 64 Bit applications with the same assembly
  • Support for the latest TWAIN Version 2.1 specification
  • New task oriented online help
  • Visual Studio 2010 Help format included
  • .Net 2.0 and 4.0 assemblies
  • New properties to select the version of TWAIN used
  • TwainAvailable property to confirm TWAIN data source manager is installed

64 Bit TWAIN Issues
We’ve had lots of folks asking about TWAIN support for their 64 applications and this release adds that support. However due to the architecture of the TWAIN support for 64 applications it will only support 64 bit TWAIN drivers. As of now there are not many, if any, true TWAIN Version 2.x 64 bit drivers that we are aware of. This means that applications that must support twain should continue to run as 32 bit applications for compatibility with the most installed scanners drivers. This limitation is a part of TWAIN and not specific to the ImageMan.Net Twain toolkit.

Scanner Manufacturers and 64 Bit drivers
So from a practical standpoint until manufacturers start producing 64 bit drivers it’s not practical to have 64 bit scanning applications. Note that some manufacturers are saying they have 64 bit drivers for 64 bit operating systems but in actuality they just have 32 bit TWAIN 1.9 drivers that run on 64 bit operating systems. These are not the same as a true TWAIN Version 2.x 64 bit driver.

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