ICAP_EXTIMAGEINFO

Description

Allows the application to query the data source to see if it supports the operation triplet DG_IMAGE DAT_EXTIMAGEINFO MSG_GET. Support is only available if the capability is supported and the value TRUE is allowed.

When set to TRUE, the source supports the DG_IMAGE DAT_EXTIMAGEINFO MSG_GET message, and data will be returned by this call for any supported TWEI_ items.

When set to FALSE, the application is indicating that it will make no calls to DG_IMAGE DAT_EXTIMAGEINFO MSG_GET. FALSE is the default. Note: The TWAIN API allows for an application to query the results of many advanced device/ manufacturer operations. The responsibility of configuring and setting up each advanced operation lies with the device’s data source user interface. Since the configuration of advanced device/manufacturer-specific operations varies from manufacturer to manufacturer, placing the responsibility for setup and configuration of advanced operations allows the application to remain device independent.

Application

Set this capability to FALSE if there is no intent to use DG_IMAGE DAT_EXTIMAGEINFO MSG_GET. This may improve performance, since the Source is not required to collect that information from the device. Set this capability to TRUE if using DG_IMAGE DAT_EXTIMAGEINFO MSG_GET to ensure all TWEI_ are available.

Values

Type: TW_BOOL

Value after MSG_OPENDS: (may be remembered from a previous session)

After MSG_RESET/MSG_RESETALL: TRUE

Allowed Values: TRUE or FALSE

Containers

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

MSG_RESET TW_ONEVALUE

MSG_QUERYSUPPORT TW_ONEVALUE

Required By

None

TWAIN Version Introduced

Version 1.7

Related

ICAP_SUPPORTEDEXTIMAGEINFO