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In order to support TWAIN applications with private capabilities, WIA drivers can use a technique known as pass-through functionality. The pass-through mechanism refers to the way a TWAIN-compatible application communicates with a WIA driver, using the data source manager and the TWAIN compatibility layer as intermediaries. It is important to note that TWAIN capability pass-through is supported only in Windows XP and later operating system versions.

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Twain Compliant App

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Using TWAIN-compliant and WIA-compliant software From a TWAIN-enabled or WIA-enabled program, you can open the scanning feature and scan an image directly into the open program. For more information, see the Help file or the documentation that came with your TWAIN-compliant or WIA-compliant software program. Twain compliant device free download. VoodooHDA VoodooHDA is an open source audio driver for devices compliant with the Intel High Definition Audio. Award-winning remote support software, ticket and asset management, performance monitoring, secure file transfer, and a suite of network management solutions are all available in our 5 Essential. Mar 16, 2021 Rx software Support - With TWAIN compliant, scan directly to your pharmacy software such Rx Software and ScriptPro Support Windows XP/Vista/7/8/10 - user can download and install driver on Plustek website without disc. Scan easily using any TWAIN-compliant remote desktop hosted software. RemoteScan connects your document scanners and cameras to software hosted in Azure Cloud, Terminal Server, VMware or Citrix servers. It enables a secure document scanning workflow, immediately sending documents to the server over encrypted virtual channels.

All communication between a TWAIN-compatible application and the WIA driver goes first to the data source manager (twain_32.dll), which in turn calls into the TWAIN compatibility layer (wiadss.dll). The TWAIN compatibility layer then calls the IWiaItemExtras::Escape method, which calls the IStiUSD::Escape method. The TWAIN compatibility layer calls only the IWiaItemExtras::Escape method. The driver developer should be concerned only with the device receiving an IStiUSD::Escape call. For more information about IWiaItemExtras::Escape, see the Microsoft Windows SDK documentation.

Note The purpose of TWAIN pass-through functionality is to provide support to driver writers who are making the transition from TWAIN drivers to WIA drivers. It is not intended for the purpose of adding TWAIN features to a WIA driver. If your WIA driver does not require support for TWAIN, you should not add this functionality to your driver.

The following topics are discussed in this section: