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c# 調(diào)用API訪問其他窗體上的文本和執(zhí)行單擊事件等等

 長江黃鶴 2019-11-06

首先新建WinAPIuser32類（API聲明類）

using System;

using System.Collections.Generic;

using System.Text;

using System.Runtime.InteropServices;

 

namespace WinAPITest

{

    public class WinAPIuser32

    {

        /// <summary>

        /// 根據(jù)句柄得到控件ID

        /// </summary>

        /// <param name="hwndCtl"></param>

        /// <returns></returns>

        [DllImport("user32.dll")]

        public static extern int GetDlgCtrlID(IntPtr hwndCtl);

        /// <summary>

        /// 由控件ID獲得控件窗口句柄

        /// </summary>

        /// <param name="hDlg"></param>

        /// <param name="nIDDlgItem"></param>

        /// <returns></returns>

        [DllImport("user32.dll ", EntryPoint = "GetDlgItem")]

        public static extern IntPtr GetDlgItem(

        IntPtr hDlg,

        int nIDDlgItem

        );

        /// <summary>

        ///  查找句柄

        /// </summary>

        /// <param name="lpClassName"></param>

        /// <param name="lpWindowName"></param>

        /// <returns></returns>

        [DllImport("user32.dll", EntryPoint = "FindWindow", SetLastError = true)]

        public static extern IntPtr FindWindow(string lpClassName, string lpWindowName);

        /// <summary>

        /// 查找句柄

        /// </summary>

        /// <param name="hwndParent"></param>

        /// <param name="hwndChildAfter"></param>

        /// <param name="lpszClass">類名</param>

        /// <param name="lpszWindow">標(biāo)題</param>

        /// <returns></returns>

        [DllImport("user32.dll", EntryPoint = "FindWindowEx", SetLastError = true)]

        public static extern IntPtr FindWindowEx(IntPtr hwndParent, uint hwndChildAfter, string lpszClass, string lpszWindow);

        [DllImport("user32.dll")]

        public static extern int FindWindowEx(int hwndParent, int hwndChildAfter, string lpszClass, string lpszWindow);

        /// <summary>

        /// 發(fā)送消息

        /// </summary>

        /// <param name="hwnd"></param>

        /// <param name="wMsg"></param>

        /// <param name="wParam"></param>

        /// <param name="lParam"></param>

        /// <returns></returns>

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

        public static extern int SendMessage(IntPtr hwnd, uint wMsg, int wParam, int lParam);

        [DllImport("User32.dll")]

        public static extern int SendMessage(int hWnd, int Msg, int wParam, int lParam);

        /// <summary>

        /// 發(fā)送文本消息

        /// </summary>

        /// <param name="hWnd"></param>

        /// <param name="Msg"></param>

        /// <param name="wParam"></param>

        /// <param name="lParam"></param>

        /// <returns></returns>

        [DllImport("User32.dll", EntryPoint = "SendMessage", CharSet = CharSet.Auto)]

        public static extern int SendTextMessage(

            IntPtr hWnd, // handle to destination window

            int Msg, // message

            int wParam, // first message parameter

            string lParam

            // int  lParam // second message parameter

        );

        /// <summary>

        /// 獲取焦點(diǎn)

        /// </summary>

        /// <param name="hwnd"></param>

        [DllImport("user32.dll", EntryPoint = "SetForegroundWindow", SetLastError = true)]

        public static extern void SetForegroundWindow(IntPtr hwnd);

 

        [DllImport("user32.dll")]

        public static extern int SetWindowText(int hwnd, string lpString);

 

        [DllImport("user32.dll")]

        public static extern int SetFocus(int hWnd);

 

        [DllImport("user32.dll")]

        public static extern int EnumChildWindows(int hWndParent, CallBack lpfn, int lParam);

        /// <summary>

        /// 回調(diào)業(yè)務(wù)

        /// </summary>

        public delegate void CallBusiness(IntPtr hwnd);

        public delegate bool CallBack(IntPtr hwnd, int lParam);

        /// <summary>

        /// 遍歷子窗體的父窗體句柄

        /// </summary>

        public static CallBack callBackEnumChildWindows = new CallBack(ChildWindowProcess);

        /// <summary>

        /// 委托業(yè)務(wù),需要客戶端添加

        /// </summary>

        public static CallBusiness CallFuntion;

        /// <summary>

        /// 遍歷子窗體或控件

        /// </summary>

        /// <param name="hWnd"></param>

        /// <param name="lParam"></param>

        /// <returns></returns>

        public static bool EnumChildWindows(IntPtr hWnd, int lParam)

        {

            EnumChildWindows(hWnd.ToInt32(), callBackEnumChildWindows, 0);

            return true;

        }

        /// <summary>

        /// 獲取類名字

        /// </summary>

        /// <param name="hwnd">需要獲取類名的句柄</param>

        /// <param name="lpClassName">類名(執(zhí)行完成以后查看)</param>

        /// <param name="nMaxCount">緩沖區(qū)</param>

        /// <returns></returns>

        [DllImport("user32.dll", EntryPoint = "GetClassName")]

        public static extern int GetClassName(

            IntPtr hwnd,

            StringBuilder lpClassName,

            int nMaxCount

        );

        /// <summary>

        /// 遍歷子控件

        /// </summary>

        /// <param name="hwnd"></param>

        /// <param name="lParam"></param>

        /// <returns></returns>

        public static bool ChildWindowProcess(IntPtr hwnd, int lParam)

        {

            if (CallFuntion != null)

            {

                CallFuntion(hwnd);

            }

            return true;

        }

        [DllImport("user32.dll", EntryPoint = "PostMessage")]

        public static extern int PostMessage(IntPtr hwnd, int wMsg, int wParam, int lParam);

 

        /// <summary>

        /// 最大化窗口（3），最小化窗口（2），正常大小窗口（1）第二個(gè)參數(shù)；

        /// </summary>

        [DllImport("user32.dll", EntryPoint = "ShowWindow", CharSet = CharSet.Auto)]

        public static extern int ShowWindow(IntPtr hwnd, int nCmdShow);

 

        /// <summary>

        /// 移動(dòng)窗體

        /// </summary>

        [DllImport("user32.dll", EntryPoint = "MoveWindow")]

        public static extern int MoveWindow(IntPtr hwnd, int x, int y, int nWidth, int nHeight, int bRepaint);

 

        /// <summary>

        /// 鼠標(biāo)移動(dòng)

        /// </summary>

        [DllImport("user32.dll", EntryPoint = "SetCursorPos")]

        public static extern int SetCursorPos(int x, int y);

 

        //[DllImport("user32.dll", EntryPoint = "SendMessage")]

        //public static extern int SendMessage(IntPtr hwnd, int wMsg, uint wParam, uint lParam);

 

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

        //private static extern int SendMessage(IntPtr hwnd, uint wMsg, int wParam, int lParam);

 

    }

}

再建一個(gè)API消息編碼類

using System;

using System.Collections.Generic;

using System.Text;

 

namespace WinAPITest

{

    /// <summary>

    /// 消息編碼

    /// </summary>

    public class MSCODE

    {

        /// <summary>

        /// 鼠標(biāo)左鍵按下

        /// </summary>

        public const int WM_LBUTTONDOWN = 0x201;

        /// <summary>

        /// 鼠標(biāo)左鍵抬起

        /// </summary>

        public const int WM_LBUTTONUP = 0x202;

        /// <summary>

        /// 設(shè)置文本

        /// </summary>

        public const int WM_SETTEXT = 0xC;

 

        public const int VK_TAB = 0x9;

        public const int WM_KEYDOWN = 0x100;

        public const int WM_KEYUP = 0x101;

        public const int WM_CHAR = 0x102;

        public const int WM_SETFOCUS = 0x007;

        /// <summary>

        /// 回車鍵

        /// </summary>

        public const int VK_RETURN = 13;

        /// <summary>

        /// 回車鍵

        /// </summary>

        public const int VK_RETURN1 = 0x0D;

 

        /// <summary>

        ///字母K

        /// </summary>

        public const int VK_K = 0x4B;

        /// <summary>

        ///F5

        /// </summary>

        public const int VK_F5 = 0x74;

        /// <summary>

        ///單擊事件

        /// </summary>

        public const int BM_CLICK = 0xF5;

 

    }

}

 

新建WINFORM和WINFORM1

WINFORM1的窗體名稱為Form1aa//隨便拖幾個(gè)控件

然后再單擊事件中寫代碼

 

        private void button1_Click(object sender, EventArgs e)

        {

            Random rand = new Random();

            IntPtr hwndCalc = WinAPIuser32.FindWindow(null, "Form1aa");//獲取窗體的句柄

            //WinAPIuser32.ShowWindow(hwndCalc, 1);//最小化窗體

            IntPtr hwndThree = WinAPIuser32.FindWindowEx(hwndCalc, 0, null, "123");

            WinAPIuser32.SendMessage(hwndThree, MSCODE.BM_CLICK, 0, 0);//單擊Form1aa中的123按鈕

            //WinAPIuser32.PostMessage(hwndThree, MSCODE.BM_CLICK, 0, 0);//

            //WinAPIuser32.PostMessage(hwndThree, MSCODE.WM_LBUTTONDOWN,0 , 0);//鼠標(biāo)按下

            //WinAPIuser32.PostMessage(hwndThree, MSCODE.WM_LBUTTONUP, 0, 0);//鼠標(biāo)臺(tái)起 組成單擊事件

 

            //int x = rand.Next(800);

            //int y = rand.Next(600);

            //int nWidth = rand.Next(50, 500);

            //int nHeight = rand.Next(50, 500);

            //WinAPIuser32.MoveWindow(hwndThree, x, y, nWidth, nHeight, 1);//移動(dòng)窗體

            //WinAPIuser32.SetCursorPos(x, y);//移動(dòng)鼠標(biāo)

 

            if (hwndCalc != IntPtr.Zero)

            {

                List<IntPtr> list = new List<IntPtr>();//存儲(chǔ)所有控件的緩沖區(qū)

                WinAPIuser32.CallFuntion = delegate(IntPtr enumIntPtr)//定義委托業(yè)務(wù)

                {

                    StringBuilder s = new StringBuilder(2000);

                    WinAPIuser32.GetClassName(enumIntPtr, s, 255);

                    list.Add(enumIntPtr);

                };

                WinAPIuser32.EnumChildWindows(hwndCalc, 0);//把獲取窗體控件的句柄寫入緩沖區(qū)

                WinAPIuser32.CallFuntion = null;

                foreach (IntPtr a in list)

                {

                    WinAPIuser32.SendTextMessage(a, MSCODE.WM_SETTEXT, 0, "mextb1860第二個(gè)文本框");

                }//寫入所有文本框的

 

                //WinAPIuser32.PostMessage(list[2], MSCODE.WM_KEYDOWN, MSCODE.VK_RETURN, 0);//發(fā)送回車鍵

                //WinAPIuser32.PostMessage(list[2], MSCODE.WM_KEYDOWN, MSCODE.VK_K, 0);//發(fā)送K建

                //WinAPIuser32.PostMessage(list[3], MSCODE.WM_KEYDOWN, MSCODE.VK_RETURN1, 0);//

                //第2個(gè)文本框

                //IntPtr hwndThree = WinAPIuser32.FindWindowEx(hwndCalc, 0, null, "確定");

                // WinAPIuser32.SendMessage(hwndCalc, MSCODE.BM_CLICK, 0, 0);

                //第3個(gè)文本框

                //WinAPIuser32.SendTextMessage(list[1], MSCODE.WM_SETTEXT, 0, "mextb1860第三個(gè)文本框");//發(fā)送文本

            }

        }

 

 

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