C# 键盘监视+剪切板编程（每次复制都不一样哦！*v*）

using  System;
using  System.Collections.Generic;
using  System.Text;
using  System.Runtime.InteropServices;
using  System.Windows.Forms;
using  System.Diagnostics;

namespace  ClipboardEdit
{
     public   class  InterceptKeys
    {
         private   const   int  WH_KEYBOARD_LL  =   13 ;

         private   const   int  WM_KEYDOWN  =   0x0100 ;

         private   static  LowLevelKeyboardProc _proc  =  HookCallback;

         private   static  IntPtr _hookID  =  IntPtr.Zero;

        /// <summary>
        /// 启动监测程序
        /// </summary>
         public   static   void  RunHook()
        {
            _hookID  =  SetHook(_proc);
        }

        /// <summary>
        /// 关闭监测程序
        /// </summary>
         public   static   void  UnHook()
        {
            UnhookWindowsHookEx(_hookID);
        }

         private   static  IntPtr SetHook(LowLevelKeyboardProc proc)
        {
             using  (Process curProcess  =  Process.GetCurrentProcess())
             using  (ProcessModule curModule  =  curProcess.MainModule)
            {
                 return  SetWindowsHookEx(WH_KEYBOARD_LL, proc,GetModuleHandle(curModule.ModuleName),  0 );
            }
        }

         ///   <summary>
         ///  设置默认值与数据
         ///   </summary>
         ///   <param name="initInt"></param>
         ///   <param name="outString"> "F:\图片\精品分类\品牌图片\google徽标\@_@.gif" </param>
         public   static   void  Init( int  initInt,  string  outString)
        {
            i  =  initInt;
            str  =  outString;
        }

         private   static   int  i  =   0 ;
         private   static   string  str  =   @" I:\over\Images\google\@_@.jpg " ;

         private   static  IntPtr HookCallback( int  nCode, IntPtr wParam, IntPtr lParam)
        {
             if  (nCode  >=   0   &&  wParam  ==  (IntPtr)WM_KEYDOWN)
            {
                 int  vkCode  =  Marshal.ReadInt32(lParam);
                Keys key = (Keys)vkCode;
                 // 同时按下Ctrl+V键的时候
                 if  (Control.ModifierKeys  ==  Keys.Control  &&  key.Equals(Keys.V))
                {
                     // 获得剪切板数据
                     string  data  =  Clipboard.GetText(TextDataFormat.UnicodeText);
                     // 重新设置剪切板数据
                    DataObject m_data  =   new  DataObject();
                    m_data.SetData(DataFormats.Text,  true , str.Replace( " @_@ " ,Convert.ToString( ++ i)));
                    Clipboard.SetDataObject(m_data,  true );
                }
            }
             return  CallNextHookEx(_hookID, nCode, wParam, lParam);
        }

         #region  调用API

         private   delegate  IntPtr LowLevelKeyboardProc( int  nCode, IntPtr wParam, IntPtr lParam);

        [DllImport( " user32.dll " , CharSet  =  CharSet.Auto, SetLastError  =   true )]

         private   static   extern  IntPtr SetWindowsHookEx( int  idHook,

        LowLevelKeyboardProc lpfn, IntPtr hMod,  uint  dwThreadId);

        [DllImport( " user32.dll " , CharSet  =  CharSet.Auto, SetLastError  =   true )]

        [ return : MarshalAs(UnmanagedType.Bool)]

         private   static   extern   bool  UnhookWindowsHookEx(IntPtr hhk);

        [DllImport( " user32.dll " , CharSet  =  CharSet.Auto, SetLastError  =   true )]

         private   static   extern  IntPtr CallNextHookEx(IntPtr hhk,  int  nCode,

        IntPtr wParam, IntPtr lParam);

        [DllImport( " kernel32.dll " , CharSet  =  CharSet.Auto, SetLastError  =   true )]

         private   static   extern  IntPtr GetModuleHandle( string  lpModuleName);

         #endregion
    } 
}

InterceptKeys.RunHook();