L_TwainSetJPEGCompression

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#include "lttwn.h"

L_LTTWN_API L_INT L_TwainSetJPEGCompression(hSession, pTwJpegComp, uFlag)

HTWAINSESSION hSession;	/* handle to an existing TWAIN session */
pTW_JPEGCOMPRESSION pTwJpegComp;	/* pointer to a structure */
L_UINT uFlag;	/* flag */

Sets or restores JPEG compression options for the specified TWAIN session.

Parameter	Description
hSession	Handle to an existing TWAIN session. This handle is obtained by calling the L_TwainInitSession function.
pTwJpegComp	Pointer to a TW_JPEGCOMPRESSION structure that references the JPEG compression options.
uFlag	Flag that indicates whether to set new or restore default JPEG compression options. Possible values are:
	Value	Meaning
	LTWAIN_SET_JPEG_COMPRESSION	[0x0001] Set new JPEG compression options
	LTWAIN_RESET_JPEG_COMPRESSION	[0x0002] Restore default JPEG compression options

Returns

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

Comments

Depending upon the flag used, this function will either set JPEG compression options for the specified TWAIN session, or restore the default JPEG compression options for the specified TWAIN session. For more information about TW_JPEGCOMPRESSION, refer to the TWAIN 1.9 specification from the site "http://www.twain.org/".

This function must 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.

Functions:	L_TwainGetJPEGCompression, L_TwainInitSession, L_TwainStartCapsNeg
Topics:	Using JPEG compression for a TWAIN source