条码控件Barcode Xpress可以处理1位黑白图像、8位灰度图像以及24位彩色图像。在Barcode Xpress中可以使用ColorDepth方法或是在Barcode Xpress组件中的其他的方法可以转换其余的图像格式，如果你使用的是ImageGear的话，那么直接使用ConvertColorSpace方法就可以了。

C++示例：使用Barcode Xpress导入图像

//load a 1BPP, black and white image into the ImagXpress control
      m_pImagXpress->FileName = “C:\\testbarcodeimage.tif”;
 
      // Copy the hDib
      long hDib = m_pImagXpress->CopyDIB();
 
      // Analyze the barcode
      m_pBarcodeXpress->AnalyzehDib(hDib);
 
      // Free the hDib
      GlobalFree(LongToHandle(hDib));

VB示例：使用Barcode Xpress导入图像

' Load the image
    ImagXpress1.FileName = "C:\testbarcodeimage.tif"
 
    ' Copy the hDib
    hDib = ImagXpress1.CopyDIB
 
    ' Analyze the barcode
    BarcodeXpress1.AnalyzehDib hDib
 
    ' Free the hDib
    GlobalFree hDib

C++示例：使用ImageGear导入图像

// Create an ImageGear page
      GearCORELib::IIGPagePtr page;
      page = g_pIGCore->CreatePage();

      // Load the page from file
      m_pIGFormats->LoadPageFromFile(page, fileName, 0);

      // Export the page to a dib
      GearCORELib::IIGPlatformDIBPtr platformDib = page->PlatformDIBExport(GearCORELib::IG_DIB_EXPORT_FORMAT_WINDOWS, false, 0, 0, page->ImageWidth, page->ImageHeight, 0);
      HGLOBAL hDib = LongToHandle(platformDib->DIBPtrGet());

      // Read the barcodes
      pBarcodeXpress->AnalyzehDib(HandleToLong(hDib));

VB示例：使用ImageGear导入图像

' Load the Page
    Dim page As New IGPage
    IGFormatsCtl1.LoadPageFromFile page, fileName, 0
 
    ' Export the platform dib from the page
    Dim platformDib As IGPlatformDIB
    Set platformDib = page.PlatformDIBExport(IG_DIB_EXPORT_FORMAT_WINDOWS, False, 0, 0, page.ImageWidth, page.ImageHeight, 0)
 
    ' Get the dib handle
    Dim hDib As Long
    hDib = platformDib.DIBPtrGet
 
    ' Read the barcodes on the image
    bcx8.AnalyzehDib hDib

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