LTwain::StopFeeder

#include "ltwrappr.h"

L_INT LTwain::StopFeeder ();

Stop acquire images only from the feeder of the TWAIN source.

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:

LTwain::Acquire

LTwain::AcquireMulti

LTwain::FastAcquire

In order to stop acquire images by calling the LTwain::Acquire function, call the LTwain::StopFeeder within the LTwain::BitmapCallBack function when its fired.

In order to stop acquire images by calling the LTwain::AcquireMulti or LTwain::FastAcquire, call the LTwain::StopFeeder within the LTwain::AcquireCallBack function when its 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

class CMyTwainFeeder : public LTwain 
{ 
public: 
   L_INT BitmapCallBack(pBITMAPHANDLE pBitmap); 
   HTWAINTEMPLATEFILE m_hFile; 
}; 
L_INT CMyTwainFeeder::BitmapCallBack(pBITMAPHANDLE /*pBitmap*/) 
{ 
   StopFeeder(); 
   return SUCCESS; 
} 
// initialize session and call this function 
void TwainAcquire(pBITMAPHANDLE pBitmap, HWND /*hWnd*/) 
{ 
   L_INT nRet; 
   CMyTwainFeeder MyClass; 
   // Show the Twain Select Source UI 
   nRet = MyClass.SelectSource (NULL); 
   if (nRet != SUCCESS) 
      MessageBox (NULL, TEXT("Error occurred while selecting the source."), TEXT("ERROR"), MB_OK); 
   MyClass.EnableCallBack(TRUE); 
   nRet = MyClass.Acquire ( pBitmap,sizeof(BITMAPHANDLE), LTWAIN_SHOW_USER_INTERFACE, NULL); 
   if (nRet == SUCCESS) 
      MessageBox(NULL, TEXT("The image acquisition process completed."), TEXT("Notice"), MB_OK); 
   else 
      MessageBox(NULL, TEXT(" The image acquisition process failed!"), TEXT("Error"), MB_OK); 
}

Help Version 19.0.2017.10.27

LEADTOOLS TWAIN C++ Class Library Help

Introduction

Version History

LEADTOOLS TWAIN Features

Redistributables/Files To Be Included With Your Application

Classes and Function References

Tutorials

Quick Reference

Functions:	LTwain::Acquire, LTwain::AcquireList; LTwain::AcquireCallBack; LTwain::BitmapCallBack
Topics:	How to Acquire from the TWAIN Source
	TWAIN Functionality: Property Functions