L_TwainCancelAcquire

#include "lttw2.h"

L_INT EXT_FUNCTION L_TwainCancelAcquire(hSession);

/* handle to an existing TWAIN session */

Cancels the current acquire operation.

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

Returns

SUCCESS	The function was successful.
! = SUCCESS	An error occurred. Refer to Return Codes.

Comments

Cancels the current acquire operation.

To cancel the acquire operation call this function inside the LTWAINACQUIRECALLBACK which is called by the L_TwainAcquireMulti function, or call this function inside the LTWAINBITMAPCALLBACK which is called by the L_TwainAcquire 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_TwainAcquire, L_TwainAcquireMulti.
Topics:	How to Acquire from the TWAIN Source
	TWAIN Functionality: Property Functions

Example

HTWAINSESSION g_hSession;

L_INT EXT_CALLBACK BmpCB (HTWAINSESSION hSession, pBITMAPHANDLE pBitmap, L_VOID * pUserData)
{
   L_TwainCancelAcquire(hSession);
   return SUCCESS;
}

void TwainAcquire (pBITMAPHANDLE pBitmap)
{
   L_INT nRet = L_TwainAcquire(g_hSession, pBitmap, sizeof(BITMAPHANDLE), BmpCB, LTWAIN_SHOW_USER_INTERFACE, NULL, 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);
}