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Allows the application and Source to negotiate capabilities to be used in States 5, 6 and 7.
MSG_GET and MSG_GETCURRENT return an array of the capabilities the Source supports in States 5, 6 and 7. If either the Source or the application is older than TWAIN 2.3, use MSG_GET to get the list of allowed capabilities, and MSG_GETCURRENT to check the capabilities currently set.
MSG_SET is only needed with Sources older than TWAIN 2.3, to set the capabilities the application wants to negotiate in States 5, 6 and 7.
Stated another way, beginning with TWAIN 2.3 CAP_EXTENDEDCAPS works more like CAP_SUPPORTEDCAPS; it should be treated as a read only array, but data sources must still permit MSG_SET and MSG_RESET operations for legacy applications.
Type: TW_UINT
Value after MSG_OPENDS: (all values supported by the data source) After MSG_RESET/MSG_RESETALL: (all values supported by the data source) Allowed Values: Any xCAP_xxxx
MSG_GET TW_ARRAY
MSG_GETCURRENT TW_ARRAY
MSG_GETDEFAULT TW_ARRAY
MSG_SET TW_ONEVALUE TW_ARRAY
MSG_SETCONSTRAINT TW_ONEVALUE
TW_ARRAY
MSG_RESET TW_ARRAY
MSG_QUERYSUPPORT TW_ONEVALUE
None
Version 1.0
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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.
