activePDF Toolkit的強大之處在于對PDF文件的處理和生成功能，使用activePDF Toolkit不僅能實現PDF文件的合并，還能從PDF文件中提取單頁的PDF內容。

》》》下載activePDF Toolkit試用版

示例代碼如下：

// Copyright (c) 2013 activePDF, Inc.
// Example created 01/20/13

// Make sure to add the activePDF product .NET DLL(s) to your application.
// .NET DLL(s) are typically found in the products 'bin' folder.

class Examples
{
  public void main()
  {
    string strPath;
    int intOpenOutputFile;
    int intMergeFile;
    
    strPath = AppDomain.CurrentDomain.BaseDirectory;

    // Instantiate Object
    APToolkitNET.Toolkit oTK = new APToolkitNET.Toolkit();
    
    // Create the new PDF file
    intOpenOutputFile = oTK.OpenOutputFile(strPath + "new.pdf");
    if (intOpenOutputFile != 0)
    {
      ErrorHandler("OpenOutputFile", intOpenOutputFile);
    }
    
    // MergeFile is the equivalent of OpenInputFile and CopyForm
    
    // Extract pages 3-4 from the PDF
    intMergeFile = oTK.MergeFile(strPath + "10pages.pdf", 3, 4);
    if (intMergeFile != 1)
    {
      ErrorHandler("MergeFile", intMergeFile);
    }
    
    // Close the new file to complete PDF creation
    oTK.CloseOutputFile();
    
    // Release Object
    oTK = null;
    
    // Process Complete
    System.Diagnostics.Debug.WriteLine("Done!");
  }
  
  // Error Handling
  public static void ErrorHandler(string strMethod, object rtnCode)
  {
    System.Diagnostics.Debug.WriteLine(strMethod + " error:  " + rtnCode.ToString());
  }
}