L_TwainGetDuplexOptions

#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 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.

Returns

SUCCESS	The function was successful.
< 1	An error occurred. Refer to Return Codes.

Comments

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.

See Also

Functions:	L_TwainSetTransferOptions, L_TwainGetTransferOptions, L_TwainGetSupportedTransferMode, L_TwainSetResolution, L_TwainGetResolution, L_TwainSetImageFrame, L_TwainGetImageFrame, L_TwainSetImageUnit, L_TwainGetImageUnit, L_TwainSetImageBitsPerPixel, L_TwainGetImageBitsPerPixel, L_TwainSetImageEffects, L_TwainGetImageEffects, L_TwainSetAcquirePageOptions, L_TwainGetAcquirePageOptions, L_TwainSetRGBResponse, L_TwainShowProgress, L_TwainEnableDuplex, L_TwainSetMaxXferCount, L_TwainGetMaxXferCount
Topics:	Getting and Setting Capabilities
	TWAIN Functionality: Capability Functions

Example

For an example, refer to L_TwainEnableDuplex.