L_TwainStopFeeder

#include "lttwn.h"

L_LTTWN_API L_INT L_TwainStopFeeder (hSession);

handle to an existing TWAIN session

Stops acquiring images only from the feeder of the TWAIN source.

Parameter	Description
hSession	Handle to an existing TWAIN session. This handle is obtained by calling the L_TwainInitSession or L_TwainInitSession2 function.

Returns

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

Comments

This function stops the process of acquiring images using one of the following functions:

L_TwainAcquire

L_TwainAcquireMulti

In order to stop acquiring images with the L_TwainAcquire function, call the L_TwainStopFeeder in the LTWAINBITMAPCALLBACK callback function when it is fired.

In order to stop acquire images by calling the L_TwainAcquireMulti function, call the L_TwainStopFeeder in the LTWAINACQUIRECALLBACK callback function when it is fired.

If the TWAIN source has no feeder, then this function will fail and return an error code.

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

L_INT EXT_CALLBACK BmpCB (HTWAINSESSION hSession, pBITMAPHANDLE pBitmap, L_VOID * pUserData) 
{ 
   UNREFERENCED_PARAMETER(pUserData); 
   UNREFERENCED_PARAMETER(pBitmap); 
   L_TwainStopFeeder(hSession); 
   return SUCCESS; 
} 
L_INT TwainStopFeederExample(pBITMAPHANDLE pBitmap,HTWAINSESSION g_hSession) 
{ 
   // Show the Twain Select Source UI 
   L_INT nRet = L_TwainSelectSource(g_hSession, NULL); 
   if (nRet != SUCCESS) 
   { 
      MessageBox (NULL, TEXT("Error occurred while selecting the source."),TEXT( "ERROR"), MB_OK); 
      return nRet; 
   } 
   nRet =L_TwainAcquire(g_hSession, pBitmap, sizeof(BITMAPHANDLE), BmpCB, LTWAIN_SHOW_USER_INTERFACE, NULL, NULL); 
   if(nRet !=SUCCESS) 
      return nRet; 
   return SUCCESS; 
}

Help Version 19.0.2017.10.27

LEADTOOLS TWAIN C API Help

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Function References

Functions:	L_TwainAcquire, L_TwainAcquireMulti, L_TwainInitSession, L_TwainFastAcquire
Topics:	How to Acquire from the TWAIN Source
	TWAIN Functionality: Property Functions