L_TwainSetTransferOptions

#include "lttwn.h"

L_LTTWN_API L_INT L_TwainSetTransferOptions(hSession, pTransferOpts)

HTWAINSESSION hSession;	handle to an existing TWAIN session
pTRANSFEROPTIONS pTransferOpts;	pointer to a structure

Sets the options used for transferring data from 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.
pTransferOpts	Pointer to the TRANSFEROPTIONS structure that contains the transfer options to set.

Returns

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

Comments

To obtain the current transfer options, call L_TwainGetTransferOptions 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.

Example

#define MAKE_IMAGE_PATH(pFileName) TEXT("C:\\Users\\Public\\Documents\\LEADTOOLS Images\\")pFileName 
L_INT TwainSetTransferOptionsExample(HTWAINSESSION hSession) 
{ 
   L_INT nRet = SUCCESS; 
   nRet = L_TwainStartCapsNeg (hSession); 
   if(nRet != SUCCESS) 
      return nRet; 
   L_UINT TransferModes = 0; 
   nRet = L_TwainGetSupportedTransferMode (hSession, &TransferModes); 
   if (nRet == SUCCESS) 
   { 
      if ((TransferModes & TWAIN_TRANSFER_FILE) == TWAIN_TRANSFER_FILE) 
         MessageBox(NULL, TEXT("File transfer is supported"), TEXT("Notice!"), MB_OK); 
   } 
   else 
      return nRet; 
   TRANSFEROPTIONS TransOpts; 
   memset(&TransOpts, 0, sizeof(TRANSFEROPTIONS)); 
   nRet = L_TwainGetTransferOptions (hSession, &TransOpts, sizeof(TRANSFEROPTIONS)); 
   if (nRet == SUCCESS) 
   { 
      if (TransOpts.TransferMode != TWAIN_TRANSFER_FILE) 
      { 
         TransOpts.TransferMode = TWAIN_TRANSFER_FILE; 
         _tcscpy_s(TransOpts.szFileName, MAX_PATH, MAKE_IMAGE_PATH(TEXT("test.bmp"))); 
         TransOpts.uFileFormat = TWFF_BMP; 
      } 
      nRet = L_TwainSetTransferOptions(hSession, &TransOpts); 
      if(nRet != SUCCESS) 
         return nRet; 
   } 
   else 
      return nRet; 
   nRet = L_TwainEndCapsNeg(hSession); 
   if(nRet != SUCCESS) 
      return nRet; 
   return SUCCESS; 
}

Help Version 19.0.2017.10.27

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LEADTOOLS TWAIN C API Help

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Function References

Functions:	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_TwainGetDuplexOptions, L_TwainSetMaxXferCount, L_TwainGetMaxXferCount
Topics:	Getting and Setting Capabilities
	TWAIN Functionality: Capability Functions