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. Click the "Solution Explorer" tab.

  3. Double-click the "BarcodeTutor" folder to open it.

  4. Double-click the "Resource Files" folder to open it. Then double click "BarcodeTutor.rc" file to open it, then double click "Dialog", and then double click "IDD_BARCODETUTOR_DIALOG".

  5. Now, drag and drop 1 button, and change its properties as follows:|

    ID Caption
    Button4 IDC_FIND_DUPLICATE Find Duplicate
  6. From the View menu, select "Other Windows" menu, then select "Resource View" menu, then select Dialog, and select "IDD_BARCODETUTOR_DIALOG".

  7. Double click "the Find Duplicate" button, and add the following code:

    L_INT nDupIndex=0; 
    L_TCHAR szBuffer[MAX_PATH]; 
    memset(szBuffer, 0, MAX_PATH); 
    pBARCODEDATA pBarData = NULL; 
    if (m_Barcode.IsDuplicated(0)) 
    { 
       nDupIndex = m_Barcode.GetFirstDuplicated(0); 
       if (nDupIndex >= 0) 
       { 
          pBarData = m_Barcode.GetBarCodeDataItem(nDupIndex); 
          // Print the first duplicated barcode data 
          wsprintf(szBuffer, TEXT("Data is %hs\nUnits %d\nPosX %d\nPosY %d\nWidth %d\nHeight %d\n\n"), 
          pBarData->pszBarCodeData, 
          pBarData->nUnits, 
          pBarData->rcBarLocation.left, 
          pBarData->rcBarLocation.top, 
          abs(pBarData->rcBarLocation.right - pBarData->rcBarLocation.left), 
          abs(pBarData->rcBarLocation.bottom - pBarData->rcBarLocation.top)); 
          AfxMessageBox(szBuffer); 
          // find the next (second) duplicated barcode data 
          nDupIndex = m_Barcode.GetNextDuplicated(nDupIndex); 
          if (nDupIndex >= 0) 
          { 
             pBarData = m_Barcode.GetBarCodeDataItem(nDupIndex); 
             wsprintf(szBuffer, TEXT("Data is %hs\nUnits %d\nPosX %d\nPosY %d\nWidth %d\nHeight %d\n\n"), 
             pBarData->pszBarCodeData, 
             pBarData->nUnits, 
             pBarData->rcBarLocation.left, 
             pBarData->rcBarLocation.top, 
             abs(pBarData->rcBarLocation.right - pBarData->rcBarLocation.left), 
             abs(pBarData->rcBarLocation.bottom - pBarData->rcBarLocation.top)); 
             AfxMessageBox(szBuffer); 
          } 
       } 
       if (nDupIndex < 0) 
       { 
          wsprintf(szBuffer, TEXT("An error occurred \nError Code = %d\n"), nDupIndex); 
          AfxMessageBox(szBuffer); 
       } 
    } 
    else 
    { 
       wsprintf(szBuffer, TEXT("This Barcode is not duplicated ...")); 
       AfxMessageBox(szBuffer); 
    } 

  8. Compile and test the program.

Help Version 20.0.2018.9.25
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