#include "lttwn.h"

L_LTTWN_API L_INT L_TwainGetDuplexOptions(hSession, pbEnableDuplex, pnDuplexMode)


handle to an existing TWAIN session

L_BOOL * pbEnableDuplex;

pointer to a variable to be updated

L_INT * pnDuplexMode;

pointer to the duplex mode

Gets the current duplex mode and the enabled status of the current duplex mode for the current TWAIN source.

Parameter Description
hSession Handle to an existing TWAIN session. This handle is obtained by calling the L_TwainInitSession or L_TwainInitSession2 function.
pbEnableDuplex Pointer to a variable to be updated with a value that specifies whether the duplex mode is enabled or disabled. Possible values are:
  Value Meaning
  TRUE Duplex mode is enabled.
  FALSE Duplex mode is disabled.
pnDuplexMode Pointer to a variable to be updated with the duplex mode value.



The function was successful.

< 1

An error occurred. Refer to Return Codes.


This function gets the current duplex mode capability CAP_DUPLEX, and the duplex mode's enabled status capability CAP_DUPLEXENABLED values. For more information on these capabilities, refer to www.twain.org/download.htm and click on TWAIN Specification (Version 1.9).

To set these capabilities, call the L_TwainEnableDuplex function.

This function should be called after calling the L_TwainStartCapsNeg function and before calling the L_TwainEndCapsNeg function.

Required DLLs and Libraries


For a listing of the exact DLLs and Libraries needed, based on the toolkit version, refer to Files to be Included with your Application.

Help Version 19.0.2017.10.27
Products | Support | Contact Us | Copyright Notices
© 1991-2017 LEAD Technologies, Inc. All Rights Reserved.