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  • 用C#调用Windows API向指定窗口发送按键消息 z

    用C#调用Windows API向指定窗口发送

    一、调用Windows API。
     C#下调用Windows API方法如下:
     1、引入命名空间:using System.Runtime.InteropServices;


     2、引用需要使用的方法,格式:[DllImport("DLL文件")]方法的声明;
     [DllImport("user32.dll")]private static extern bool ShowWindow(IntPtr hWnd, int nCmdShow);
     [DllImport("user32.dll")]private static extern bool SetForegroundWindow(IntPtr hWnd);
     [DllImport("user32.dll")]private static extern IntPtr FindWindow(string lpClassName,string lpWindowName);

     [DllImport("user32.dll")]private static extern int SendMessage(IntPtr hWnd,int Msg,int wParam,int lParam);
     [DllImport("user32.dll")]private static extern bool SetCursorPos(int X, int Y);
     [DllImport("user32.dll")]private static extern void mouse_event(int dwFlags, int dx, int dy, int dwData, int dwExtraInfo);
     [DllImport("user32.dll")]private static extern void keybd_event(byte bVk, byte bScan, uint dwFlags, uint dwExtraInfo);
      [DllImport("user32.dll")]private static extern bool SetWindowPos(IntPtr hWnd, IntPtr hWndlnsertAfter, int X, int Y, int cx, int cy, uint Flags);
     //ShowWindow参数
     private const int SW_SHOWNORMAL = 1;
     private const int SW_RESTORE = 9;
     private const int SW_SHOWNOACTIVATE = 4;
     //SendMessage参数
     private const int WM_KEYDOWN = 0X100;
     private const int WM_KEYUP = 0X101;
     private const int WM_SYSCHAR = 0X106;
     private const int WM_SYSKEYUP = 0X105;
     private const int WM_SYSKEYDOWN = 0X104;
     private const int WM_CHAR = 0X102;


    二、找到目标窗口
    1)、根据窗口的标题得到句柄
     IntPtr myIntPtr = FindWindow(null,"窗口名"); //null为类名,可以用Spy++得到,也可以为空
     ShowWindow(myIntPtr, SW_RESTORE); //将窗口还原
     SetForegroundWindow(myIntPtr); //如果没有ShowWindow,此方法不能设置最小化的窗口


    2)、遍历所有窗口得到句柄

    1 定义委托方法CallBack,枚举窗口API(EnumWindows),得到窗口名API(GetWindowTextW)和得到窗口类名API(GetClassNameW)
     public delegate bool CallBack(int hwnd, int lParam);
     [DllImport("user32")]public static extern int EnumWindows(CallBack x, int y);
      [DllImport("user32.dll")]private static extern int GetWindowTextW(IntPtr hWnd, [MarshalAs(UnmanagedType.LPWStr)]StringBuilder lpString, int nMaxCount);
     [DllImport("user32.dll")]private static extern int GetClassNameW(IntPtr hWnd, [MarshalAs(UnmanagedType.LPWStr)]StringBuilder lpString, int nMaxCount);

    2 调用EnumWindows遍历窗口
     CallBack myCallBack = new CallBack(Recall);
     EnumWindows(myCallBack, 0);

    3 回调方法Recall
     public bool Recall(int hwnd, int lParam)
     {
      StringBuilder sb = new StringBuilder(256);
      IntPtr PW = new IntPtr(hwnd);

      GetWindowTextW(PW,sb,sb.Capacity); //得到窗口名并保存在strName中
      string strName = sb.ToString();

      GetClassNameW(PW,sb,sb.Capacity); //得到窗口类名并保存在strClass中
      string strClass = sb.ToString();

      if (strName.IndexOf("窗口名关键字") >= 0 && strClass.IndexOf("类名关键字") >= 0)
      {
       return false; //返回false中止EnumWindows遍历
      }
      else
      {
       return true; //返回true继续EnumWindows遍历
      }
     }


    3)、打开窗口得到句柄

    1 定义设置活动窗口API(SetActiveWindow),设置前台窗口API(SetForegroundWindow)
     [DllImport("user32.dll")]static extern IntPtr SetActiveWindow(IntPtr hWnd);
     [DllImport("user32.dll")][return: MarshalAs(UnmanagedType.Bool)]static extern bool SetForegroundWindow(IntPtr hWnd);
    2 打开窗口
     Process proc = Process.Start(@"目标程序路径");
     SetActiveWindow(proc.MainWindowHandle);
     SetForegroundWindow(proc.MainWindowHandle);


    三、向指定的窗口输入数据
    1 利用发送消息API(SendMessage)向窗口发送数据
     InputStr(myIntPtr, _GameID); //输入游戏ID
     SendMessage(myIntPtr, WM_SYSKEYDOWN, 0X09, 0); //输入TAB(0x09)
     SendMessage(myIntPtr, WM_SYSKEYUP, 0X09, 0);
     InputStr(myIntPtr, _GamePass); //输入游戏密码
     SendMessage(myIntPtr, WM_SYSKEYDOWN, 0X0D, 0); //输入ENTER(0x0d)
     SendMessage(myIntPtr, WM_SYSKEYUP, 0X0D, 0);

     /// <summary>
     /// 发送一个字符串
     /// </summary>
     /// <param name="myIntPtr">窗口句柄</param>
     /// <param name="Input">字符串</param>
     public void InputStr(IntPtr myIntPtr, string Input)
     {
      byte[] ch = (ASCIIEncoding.ASCII.GetBytes(Input));
      for (int i = 0; i < ch.Length; i++)
      {
       
    SendMessage(PW, WM_CHAR, ch, 0);
      }
     }


    2 利用鼠标和键盘模拟向窗口发送数据
     SetWindowPos(PW, (IntPtr)(-1), 0, 0, 0, 0, 0x0040 | 0x0001); //设置窗口位置
     SetCursorPos(476, 177); //设置鼠标位置
     mouse_event(0x0002, 0, 0, 0, 0); //模拟鼠标按下操作
     mouse_event(0x0004, 0, 0, 0, 0); //模拟鼠标放开操作
     SendKeys.Send(_GameID);   //模拟键盘输入游戏ID
     SendKeys.Send("{TAB}"); //模拟键盘输入TAB
     SendKeys.Send(_GamePass); //模拟键盘输入游戏密码
     SendKeys.Send("{ENTER}"); //模拟键盘输入ENTER

    另:上面还提到了keybd_event方法,用法和mouse_event方法类似,作用和SendKeys.Send一样。

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  • 原文地址:https://www.cnblogs.com/zeroone/p/3713051.html
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