Help Version 19.0.2017.10.27
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#include "lttwn.h"
L_LTTWN_API L_INT L_TwainGetDuplexOptions(hSession, pbEnableDuplex, pnDuplexMode)
HTWAINSESSION hSession; |
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. | |
SUCCESS |
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
LTTWN For a listing of the exact DLLs and Libraries needed, based on the toolkit version, refer to Files to be Included with your Application. |
For an example, refer to L_TwainEnableDuplex.