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If TRUE, the Source displays a progress indicator during acquisition and transfer, regardless of whether the Source's user interface is active. If FALSE, the progress indicator is suppressed if the Source's user interface is inactive.
The Source displays device-specific instructions and error messages if either the user interface or progress indicator is turned on. In this case it returns TWCC_OPERATIONERROR to alert the application that it handled the error, and communicated the problem to the user.
If both the user interface and progress indicator are turned off, then the Source never displays any message to the user, even if TWCC_OPERATIONERROR is returned. Messages to the user are under the sole control of the Application.
If the application plans to enable the Source with TW_USERINTERFACE. ShowUI FALSE, it can also suppress the Source’s progress indicator by using this capability.
Type: TW_BOOL
Value after MSG_OPENDS: TRUE
After MSG_RESET/MSG_RESETALL: TRUE
Allowed Values: TRUE or FALSE
MSG_GET TW_ONEVALUE TW_ENUMERATION // 2.0 and higher
MSG_GETCURRENT TW_ONEVALUE
MSG_GETDEFAULT TW_ONEVALUE
MSG_SET TW_ONEVALUE
MSG_SETCONSTRAINT TW_ONEVALUE TW_ENUMERATION // 2.0 and higher
MSG_RESET TW_ONEVALUE
MSG_QUERYSUPPORT TW_ONEVALUE
None
Version 1.1
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The TWAIN Toolkit is distributed as is. The developer and distributors of the TWAIN Toolkit expressly disclaim all implied, express or statutory warranties including, without limitation, the implied warranties of merchantability, noninfringement of third party rights and fitness for a particular purpose. Neither the developers nor the distributors will be liable for damages, whether direct, indirect, special, incidental, or consequential, as a result of the reproduction, modification, distribution or other use of the TWAIN Toolkit.
