using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;
using System.Runtime.InteropServices;
using System.Reflection;
using System.Diagnostics;
using System.IO;

namespace Csharp
{
    public class OutFrm
    {
        #region Dll Import 添加对API的引用

        //获取主窗口句柄的API函数
        [DllImport("User32.dll", EntryPoint = "FindWindow")]
        private static extern IntPtr FindWindow(string lpClassName, string lpWindowName);

        //获取子窗口句柄的API函数
        [DllImport("User32.dll", EntryPoint = "FindWindowEx")]
        private static extern IntPtr FindWindowEx(IntPtr hwndParent, IntPtr hwndChildAfter, string lpszClass, string lpszWindow);

        //向指定句柄的窗口发送消息
        [DllImport("User32.dll", EntryPoint = "SendMessage")]
        private static extern int SendMessage(IntPtr hWnd, int Msg, IntPtr wParam, string lParam);

        [DllImport("user32.dll", CharSet = CharSet.Unicode)]
        private static extern IntPtr PostMessage(IntPtr hwnd, int wMsg, IntPtr wParam, IntPtr lParam);

        const int WM_CHAR = 0x0102;     //字符
        const int WM_GETTEXT = 0x000D;  //得到文本
        const int WM_SETTEXT = 0x000C;  //设置文本
        const int WM_CLICK = 0x00F5;    //单击常量
        const int WM_CLOSE = 0x0010;  //关闭窗口
        const int WM_LBUTTONDBLCLK = 0x0203;     //双击

        const int LB_SETSEL = 0x0185;  //用于单选
        const int LB_FINDSTRING = 0x018F; //用与查找字符串
        const int SW_MAXIMIZE = 3;    //9为最小化

        #endregion

        #region 声明字段 用Spy++查到的

        //下面的这些参数都可以用Spy++查到
        public string lpszParentClass = "WindowsForms10.Window.8.app.0.378734a";     //整个窗口的类名
        public string lpszParentWindow = "Form1";                                    //窗口标题
        public string lpszClass = "WindowsForms10.EDIT.app.0.378734a";               //需要查找的子窗口的类名，也就是输入框
        public string lpszClass_Submit = "WindowsForms10.BUTTON.app.0.378734a";      //需要查找的Button的类名
        public string lpszName_Submit = "登陆";                                      //需要查找的Button的标题
        public string lpszClass_Panel = "WindowsForms10.Window.8.app.0.378734a";     //多了一个类，输入框和按钮都放在这个类上的！

        string text = "";
        IntPtr ParenthWnd = new IntPtr(0);
        IntPtr ParenthWnd_sub = new IntPtr(0);
        IntPtr EdithWnd = new IntPtr(0);

        //下面的参数设定登陆用户名及密码
        string UserID = "ueser";
        string Pwd = "pwd";

        #endregion

        #region 构造函数
        public OutFrm()
        {
            //InitializeComponent();
        }
        #endregion

        #region SetWindow 核心部分，查找窗体并对它进行登陆操作

        public int SetWindow()
        {
            int retval = 0; //增加一个返回值用来判断操作是否成功

            //查到窗体，得到整个窗体
            ParenthWnd = FindWindow(lpszParentClass, lpszParentWindow);
            ParenthWnd_sub = FindWindowEx(ParenthWnd, EdithWnd, lpszClass_Panel, "");

            //判断这个窗体是否有效
            if (!ParenthWnd_sub.Equals(IntPtr.Zero))
            {
                //得到UserName这个子窗体，并设置其内容
                EdithWnd = FindWindowEx(ParenthWnd_sub, EdithWnd, lpszClass, "");
                if (!EdithWnd.Equals(IntPtr.Zero))
                {
                    text = UserID;
                    //调用SendMessage方法设置其内容
                    SendMessage(EdithWnd, WM_SETTEXT, (IntPtr)0, text);
                    retval++;
                }

                //得到Password这个子窗体，并设置其内容
                EdithWnd = FindWindowEx(ParenthWnd_sub, EdithWnd, lpszClass, "");
                if (!EdithWnd.Equals(IntPtr.Zero))
                {
                    text = Pwd;
                    SendMessage(EdithWnd, WM_SETTEXT, (IntPtr)0, text);
                    retval++;
                }

                //得到Button这个子窗体，并触发它的Click事件
                EdithWnd = (IntPtr)0;
                EdithWnd = FindWindowEx(ParenthWnd_sub, EdithWnd, lpszClass_Submit, lpszName_Submit);
                if (!EdithWnd.Equals(IntPtr.Zero))
                {
                    SendMessage(EdithWnd, WM_CLICK, (IntPtr)0, "0");
                    retval++;
                }
            }
            return retval;
        }
        #endregion
    }
}