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[ASP.net教程]C#模拟键盘输入(一)

  主要使用了Windows API 实现,你可以在你C盘下的system32文件夹中找到user32.dll,函数的说明在MSDN都有,只需要拿名字去搜一下就行

  根据窗口的类名和窗口名称获取窗口句柄,成功返回一个窗口的句柄,否则返回0:

    [DllImport("User32.dll", EntryPoint = "FindWindow")]    private static extern IntPtr FindWindow(string lpClassName, string lpWindowName);

  在窗口列表中寻找与指定条件相符的第一个子窗口

    [DllImport("user32.dll", EntryPoint = "FindWindowEx")]    static extern IntPtr FindWindowEx(IntPtr hwndParent, IntPtr hwndChildAfter, string lpClass, string lpszWindow);

  找到句柄后向窗口发送消息,SendMessage方法有很多的重载

    [DllImport("user32.dll ", EntryPoint = "SendMessage")]    public static extern IntPtr SendMessage(IntPtr hWnd, int Msg, IntPtr wParam, string lParam);    [DllImport("user32.dll", EntryPoint = "SendMessage")]    public static extern IntPtr SendMessage(IntPtr hwnd, int wMsg, IntPtr wParam, IntPtr lParam);

    const int WM_CHAR = 0x0102;    const int WM_SETTEXT = 0x000C;    const int VK_RETURN = 0x0d;    static void Main(string[] args)    {      IntPtr handle = FindWindow(null, "Hello.txt - 记事本");      handle = FindWindowEx(handle, IntPtr.Zero, "Edit", null);      if (handle == IntPtr.Zero)      {        Console.WriteLine("没有找到句柄");        return;      }      SendMessage(handle, WM_SETTEXT, IntPtr.Zero, "Hello word!");
SendMessage(handle, WM_CHAR, (IntPtr)VK_RETURN, IntPtr.Zero);//Enter
}