Writing Barcodes

Take the following steps to add code to an existing project that will let you write 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_WRITE_BARCODES       201  

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

    MAIN_MENU   MENU 
    BEGIN 
       ... 
       ... 
       MENUITEM "Write Barcode"   IDM_WRITE_BARCODES 
    END 

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

    case IDM_WRITE_BARCODES: 
    { 
       BARCODE1D Bar1d; 
       memset(&Bar1d, 0, sizeof(BARCODE1D)); 
       Bar1d.uStructSize = sizeof(BARCODE1D); 
       Bar1d.bErrorCheck = TRUE; 
       Bar1d.bOutShowText = TRUE; 
       BARCODEDATA BarData; 
       memset(&BarData, 0, sizeof(BARCODEDATA)); 
       BarData.uStructSize = sizeof(BARCODEDATA); 
       BarData.nUnits = BARCODE_SCANLINES_PER_PIXELS; 
       SetRect(&BarData.rcBarLocation, 100, 100, 350, 200); 
       BarData.pszBarCodeData = "012345678901"; 
       BarData.nSizeofBarCodeData = (L_INT)strlen(BarData.pszBarCodeData); 
       BarData.ulType = BARCODE_1D_EAN_13; 
       BARCODECOLOR BarColor; 
       memset(&BarColor, 0, sizeof(BARCODECOLOR)); 
       BarColor.uStructSize = sizeof(BARCODECOLOR); 
       BarColor.dwColorBar = RGB(0, 0, 0); 
       BarColor.dwColorSpace = RGB(255, 255, 255); 
       L_INT nRet = L_BarCodeWrite(&LeadBitmap, &BarData, &BarColor, 0, &Bar1d, NULL, NULL, NULL, NULL, NULL, NULL, NULL); 
       if (nRet == SUCCESS) 
          InvalidateRect(hWnd, NULL, TRUE); 
       else 
          MessageBox(hWnd, TEXT("Failure during writing linear barcodes"), TEXT("Error!"), MB_OK); 
    } 
    break; 

  5. Build and run the program to test it.

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