L_Doc2UpdatePage

#include "ltdoc2.h"

L_LTDOC2_API L_INT EXT_FUNCTION L_Doc2UpdatePage(hDoc, pBitmap, nPageIndex)

Updates the current page with a new bitmap.

Parameters

L_HDOC2 hDoc

Handle to the OCR document.

pBITMAPHANDLE pBitmap

Pointer to the bitmap handle that references the new page to be updated into the internal OCR list of pages.

L_INT nPageIndex

Index of the page to be updated. This is a zero-based index.

Returns

Comments

Use this function to update the content of a page after performing image processing on it.

For example, after a page is flipped using the L_FlipBitmap function, this function should then be called to update the OCR page.

✅ IMPORTANT

Before using this function it is necessary to lock the page for updating by calling the L_Doc2LockPage / L_Doc2LockPageExt function, and after the update is completed, and then unlock the page by calling the L_Doc2UnlockPage / L_Doc2UnlockPageExt function.

Required DLLs and Libraries

• LTDOC2
• For a listing of the exact DLLs and Libraries needed, based on the toolkit version, refer to Files To Be Included With Your Application.

L_INT Doc2UpdatePageExample(L_HDOC2 hDoc, L_INT nPageIndex, pBITMAPHANDLE pBitmap) 
{ 
   L_INT nRet; 
   nRet = L_Doc2LockPage (hDoc, nPageIndex); 
   if(nRet != SUCCESS) 
      return nRet; 
 
   nRet = L_Doc2UpdatePage(hDoc, pBitmap, nPageIndex); 
   if (nRet != SUCCESS) 
   { 
      MessageBox(NULL, TEXT("An error occurred during L_Doc2UpdatePage."), TEXT("Error!"), MB_OK); 
      return nRet; 
   } 
   else 
      MessageBox(NULL, TEXT("The specified page is updated."), TEXT("Notice!"), MB_OK); 
 
   nRet = L_Doc2UnlockPage (hDoc, nPageIndex); 
   if(nRet != SUCCESS) 
      return nRet; 
   return SUCCESS; 
}