Finding Duplicate Barcodes

Take the following steps to add code to the existing project that will let you to find duplicate barcodes:

1. Start with the program you created in Reading Barcodes.

2. Define the following global IDs in Ezfunc.h in the BarcodeTutor directory:

   #define IDM_FIND_DUPLICATE       202 

3. Edit EZFUNC.RC file in the BarcodeTutor directory and add the following lines:

   MAIN_MENU   MENU 
   BEGIN 
      ... 
      ... 
      MENUITEM "Find Duplicate"  IDM_FIND_DUPLICATE 
   END 

4. In the MainWndProc procedure, add the following code to the switch statement for WM_COMMAND:

   case idm_find_duplicate 
   { 
      l_int ndupindex=0; 
      l_tchar szbuffer[max_path]; 
      memset(szbuffer, 0, max_path); 
      if (l_barcodeisduplicated(&(pbarcodes[0]))) 
      { 
         ndupindex=L_BarCodeGetDuplicated(&(pBarCodes[0])); 
         if (ndupindex>= 0) 
         { 
            // Print the first duplicated barcode data 
            wsprintf(szBuffer, TEXT("Data is %hs\nUnits %d\nPosX %d\nPosY %d\nWidth %d\nHeight %d\n\n"), 
            pBarCodes[nDupIndex].pszBarCodeData, 
            pBarCodes[nDupIndex].nUnits, 
            pBarCodes[nDupIndex].rcBarLocation.left, 
            pBarCodes[nDupIndex].rcBarLocation.top, 
            abs(pBarCodes[nDupIndex].rcBarLocation.right - pBarCodes[nDupIndex].rcBarLocation.left), 
            abs(pBarCodes[nDupIndex].rcBarLocation.bottom - pBarCodes[nDupIndex].rcBarLocation.top)); 
            MessageBox(hWnd, szBuffer, TEXT("BarCode Info."), MB_OK); 
            // find the next (second) duplicated barcode data 
            nDupIndex = L_BarCodeGetNextDuplicated(pBarCodes, nDupIndex); 
            if (nDupIndex >= 0) 
            { 
               wsprintf(szBuffer, TEXT("Data is %hs\nUnits %d\nPosX %d\nPosY %d\nWidth %d\nHeight %d\n\n"), 
               pBarCodes[nDupIndex].pszBarCodeData, 
               pBarCodes[nDupIndex].nUnits, 
               pBarCodes[nDupIndex].rcBarLocation.left, 
               pBarCodes[nDupIndex].rcBarLocation.top, 
               abs(pBarCodes[nDupIndex].rcBarLocation.right - pBarCodes[nDupIndex].rcBarLocation.left), 
               abs(pBarCodes[nDupIndex].rcBarLocation.bottom - pBarCodes[nDupIndex].rcBarLocation.top)); 
               MessageBox(hWnd, szBuffer, TEXT("BarCode Info."), MB_OK); 
            } 
         } 
         if (nDupIndex < 0) 
         { 
            wsprintf(szBuffer, TEXT("An error occurred \nError Code = %d\n"), nDupIndex); 
            MessageBox(hWnd, szBuffer, TEXT("Notice!"), MB_OK); 
         } 
      } 
      else 
      { 
         wsprintf(szBuffer, TEXT("This Barcode is not duplicated ...")); 
         MessageBox(hWnd, szBuffer, TEXT("Notice!"), MB_OK); 
      } 
   } 
   break; 

5. Build SimpleLoad.exe.

6. Run SimpleLoad.exe.