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±¾ÎÄ×ÅÖؽ²ÊöÁËÈç¹ûÓÃWM_COPYDATAÏûÏ¢À´ÊµÏÖÁ½¸ö½ø³ÌÖ®¼ä´«µÝÊý¾Ý.
½ø³ÌÖ®¼äͨѶµÄ¼¸ÖÖ·½·¨:
ÔÚWindows³ÌÐòÖУ¬¸÷¸ö½ø³ÌÖ®¼ä³£³£ÐèÒª½»»»Êý¾Ý£¬½øÐÐÊý¾ÝͨѶ¡£³£Óõķ½·¨ÓÐ
  ʹÓÃÄÚ´æÓ³ÉäÎļþ
  ͨ¹ý¹²ÏíÄÚ´æDLL¹²ÏíÄÚ´æ
  ʹÓÃSendMessageÏòÁíÒ»½ø³Ì·¢ËÍWM_COPYDATAÏûÏ¢
±ÈÆðÇ°Á½Öֵĸ´ÔÓʵÏÖÀ´,WM_COPYDATAÏûÏ¢ÎÞÒÉÊÇÒ»ÖÖ¾­¼Ãʵ»ÝµÄÒ»Öз½·¨.
WM_COPYDATAÏûÏ¢µÄÖ÷ҪĿµÄÊÇÔÊÐíÔÚ½ø³Ì¼ä´«µÝÖ»¶ÁÊý¾Ý¡£WindowsÔÚͨ¹ýWM_COPYDATAÏûÏ¢´«µÝÆڼ䣬²»Ìṩ¼Ì³Ðͬ²½·½Ê½¡£SDKÎĵµÍƼöÓû§Ê¹ÓÃSendMessageº¯Êý£¬½ÓÊÜ·½ÔÚÊý¾Ý¿½±´Íê³ÉÇ°²»·µ»Ø£¬ÕâÑù·¢ËÍ·½¾Í²»¿ÉÄÜɾ³ýºÍÐÞ¸ÄÊý¾Ý£º
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SendMessage(hwnd,WM_COPYDATA,wParam,lParam);
ÆäÖÐ,WM_COPYDATA¶ÔÓ¦µÄÊ®Áù½øÖÆÊýΪ0x004A
wParamÉèÖÃΪ°üº¬Êý¾ÝµÄ´°¿ÚµÄ¾ä±ú¡£lParamÖ¸ÏòÒ»¸öCOPYDATASTRUCTµÄ½á¹¹£º
typedef struct tagCOPYDATASTRUCT{
    DWORD dwData;//Óû§¶¨ÒåÊý¾Ý
    DWORD cbData;//Êý¾Ý´óС
    PVOID lpData;//Ö¸ÏòÊý¾ÝµÄÖ¸Õë
}COPYDATASTRUCT;
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¾ßÌå¹ý³ÌÈçÏÂ:
Ê×ÏÈ,ÔÚ·¢ËÍ·½,ÓÃFindWindowÕÒµ½½ÓÊÜ·½µÄ¾ä±ú,È»ºóÏò½ÓÊÜ·½·¢ËÍWM_COPYDATAÏûÏ¢.
½ÓÊÜ·½ÔÚDefWndProcʼþÖÐ,À´´¦ÀíÕâÌõÏûÏ¢.ÓÉÓÚÖÐÎıàÂëÊÇÁ½¸ö×Ö½Ú,ËùÒÔ´«µÝÖÐÎÄʱºò×Ö½Ú³¤¶ÈÒª¸ãÇå³þ.
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//---------------------------------------------------
//·¢ËÍ·½:
//---------------------------------------------------
using System;
using System.Drawing;
using System.Collections;
using System.ComponentModel;
using System.Windows.Forms;
using System.Data;
using System.Runtime.InteropServices;
namespace WindowsFormGetMsg
{
 public class Form1 : System.Windows.Forms.Form
 {
  private System.Windows.Forms.TextBox textBox1;
  private System.ComponentModel.Container components = null;
  const int WM_COPYDATA = 0x004A;
  public Form1()
  {
   InitializeComponent();
  }
  protected override void Di


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