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If TRUE, indicates that this Source supports acquisition with the UI disabled; i.e., TW_USERINTERFACE’s ShowUI field can be set to FALSE. If FALSE, indicates that this Source can only support acquisition with the UI enabled.
This is a read only capability.
This capability was introduced in TWAIN 1.6. All Sources compliant with TWAIN 1.6 and above must support this capability. Sources that are not TWAIN 1.6-compliant may return TWRC_FAILURE / TWCC_BADCAP if they do not support this capability.
All Sources compliant with TWAIN 1.9 and above must support the ability to scan without the UI (TW_USERINTERFACE ShowUI and CAP_INDICATORS FALSE , therefore they must report a value of TRUE for this capability.
A return value of TWRC_FAILURE / TWCC_CAPUNSUPPORTED indicates that the Source in use is not TWAIN 1.6-compliant. Therefore, the Source may ignore TW_USERINTERFACE’s ShowUI field when MSG_ENABLEDS is issued. See the description of DG_CONTROL DAT_USERINTERFACE MSG_ENABLEDS for more details.
Type: TW_BOOL
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 Not Allowed MSG_SETCONSTRAINT Not Allowed MSG_RESET Not Allowed MSG_QUERYSUPPORT TW_ONEVALUE
All Sources // 1.9 and higher
Version 1.6
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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.
