Available in LEADTOOLS Imaging Pro, Vector, Document, and Medical Imaging toolkits. |
L_TwainCancelAcquire
#include "lttwn.h"
L_LTTWN_API L_INT L_TwainCancelAcquire(hSession);
HTWAINSESSION 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: |
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Topics: |
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Example
static L_INT EXT_CALLBACK BmpCB(HTWAINSESSION hSession, pBITMAPHANDLE pBitmap, L_VOID * pUserData) { UNREFERENCED_PARAMETER(pBitmap); UNREFERENCED_PARAMETER(pUserData); L_TwainCancelAcquire(hSession); return SUCCESS; } L_INT TwainCancelAcquireExample(pBITMAPHANDLE pBitmap,HTWAINSESSION g_hSession) { L_INT nRet; 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); return nRet; } return SUCCESS; }