💬 C# WinForms + AutoHotkey를 활용한 카카오톡 메시지 자동 입력 예제

using System; using System.Collections.Generic; using System.ComponentModel; using System.Data; using System.Drawing; using System.Linq; using System.Text; using System.Threading.Tasks; using System.Windows.Forms; using System.Runtime.InteropServices; using System.Threading; using AutoHotkey.Interop; namespace KakaoTalkAutomation { public partial class Form1 : Form { #region Win32 API Declarations [DllImport("user32.dll", CharSet = CharSet.Auto)] private static extern IntPtr FindWindow(string lpClassName, string lpWindowName); [DllImport("user32.dll", CharSet = CharSet.Auto)] private static extern IntPtr FindWindowEx(IntPtr hwndParent, IntPtr hwndChildAfter, string lpszClass, string lpszWindow); [DllImport("user32.dll", CharSet = CharSet.Auto)] private static extern int SendMessage(IntPtr hwnd, int wMsg, int wParam, string lParam); [DllImport("user32.dll", CharSet = CharSet.Auto)] private static extern int PostMessage(IntPtr hwnd, int wMsg, int wParam, int lParam); [DllImport("user32.dll")] private static extern void keybd_event(byte bVk, byte bScan, int dwFlags, int dwExtraInfo); [DllImport("user32.dll")] private static extern short GetKeyState(int nVirtKey); [DllImport("user32.dll")] private static extern IntPtr GetWindow(IntPtr hwnd, int wCmd); [DllImport("user32.dll", CharSet = CharSet.Auto)] private static extern int GetClassName(IntPtr hwnd, System.Text.StringBuilder lpClassName, int nMaxCount); [DllImport("user32.dll", CharSet = CharSet.Auto)] private static extern int GetWindowText(IntPtr hwnd, System.Text.StringBuilder lpString, int nMaxCount); #endregion #region Constants private const int WM_SETTEXT = 0x000C; private const int WM_KEYDOWN = 0x0100; private const int WM_KEYUP = 0x0101; private const int VK_RETURN = 0x0D; private const int VK_CONTROL = 0x11; private const int VK_ESC = 0x1B; private const int KEYEVENTF_KEYUP = 0x0002; private const int VK_A = 0x41; private const int VK_V = 0x56; private const int VK_C = 0x43; private const int VK_DOWN = 0x28; private const int VK_UP = 0x26; [DllImport("user32.dll")] static extern bool SetForegroundWindow(IntPtr hWnd); [DllImport("user32.dll")] static extern void mouse_event(uint dwFlags, uint dx, uint dy, uint dwData, UIntPtr dwExtraInfo); const uint MOUSEEVENTF_LEFTDOWN = 0x0002; const uint MOUSEEVENTF_LEFTUP = 0x0004; [DllImport("user32.dll")] static extern bool GetWindowRect(IntPtr hWnd, out RECT lpRect); [DllImport("user32.dll")] static extern bool SetCursorPos(int X, int Y); [DllImport("user32.dll")] static extern bool DestroyWindow(IntPtr hWnd); [StructLayout(LayoutKind.Sequential)] public struct RECT { public int Left; public int Top; public int Right; public int Bottom; } #endregion private AutoHotkeyEngine ahk; private void Form1_Load(object sender, EventArgs e) { ahk = new AutoHotkeyEngine(); // AutoHotkey 인터프리터 초기화 } /// <summary> /// 카카오톡 메시지를 보내는 메인 메서드 /// </summary> public bool SendKakao(string target, string message, bool chatRoomSearch = false, int delay = 1) { IntPtr hwndRichEdit = FindRecepientHwnd(target, chatRoomSearch, delay); if (hwndRichEdit == IntPtr.Zero) { MessageBox.Show("Could not find the KakaoTalk chat window for the target."); //Could not find the KakaoTalk chat window for the target. return false; } SendTextMessage(message, hwndRichEdit); return true; } //실제 메시지 전송을 처리하는 메서드 private void SendTextMessage(string message, IntPtr hwndRichEdit) { // 텍스트에 줄바꿈이 있으면 Shift + Enter로 변경 string input = message.Replace("\r\n", "+{Enter}").Replace("\n", "+{Enter}"); //textBox1.Text 대화창명 = 메세지 보낼사람 string script = $@" SetTitleMatchMode, 2 IfWinExist, {textBox1.Text} {{ WinActivate Sleep, 500 SendInput, {input} ; SendInput 사용 Send, {{Enter}} ; 엔터 전송 }}"; ahk.ExecRaw(script); // AutoHotkey 스크립트 실행 }

// 수신자의 채팅창 핸들을 찾는 메서드 private IntPtr FindRecepientHwnd(string target, bool chatRoomSearch, int delay) { ActiveChat(target, delay, chatRoomSearch); IntPtr hwndKakaoTalk = FindWindow(null, target); DateTime startTime = DateTime.Now; while (hwndKakaoTalk == IntPtr.Zero) { hwndKakaoTalk = FindWindow(null, target); if ((DateTime.Now - startTime).TotalSeconds > 2) { return IntPtr.Zero; } Thread.Sleep(100); } IntPtr hwndRichEdit = FindWindowEx(hwndKakaoTalk, IntPtr.Zero, "RICHEDIT50W", null); //RICHEDIT50W if (hwndRichEdit == IntPtr.Zero) { hwndRichEdit = FindWindowEx(hwndKakaoTalk, IntPtr.Zero, "RichEdit20W", null); } return hwndRichEdit; } // 채팅창을 활성화하는 메서드 private void ActiveChat(string target, int delay, bool chatRoomSearch) { if (FindWindow(null, target) != IntPtr.Zero) { return; } IntPtr hwndMain = FindHwndEVA(); if (hwndMain == IntPtr.Zero) { return; } IntPtr hwndChild1 = FindWindowEx(hwndMain, IntPtr.Zero, "EVA_ChildWindow", null); IntPtr hwndChild2 = FindWindowEx(hwndChild1, IntPtr.Zero, "EVA_Window", null); if (chatRoomSearch) { hwndChild2 = FindWindowEx(hwndChild1, hwndChild2, "EVA_Window", null); } IntPtr hwndEdit = FindWindowEx(hwndChild2, IntPtr.Zero, "Edit", null); SendMessage(hwndEdit, WM_SETTEXT, 0, target); Thread.Sleep(delay); if (chatRoomSearch) { PostMessage(hwndEdit, WM_KEYDOWN, VK_UP, 0); Thread.Sleep(delay); } PostMessage(hwndEdit, WM_KEYDOWN, VK_RETURN, 0); Thread.Sleep(delay); } // 카카오톡 메인 윈도우를 찾는 메서드 private IntPtr FindHwndEVA() { IntPtr hwnd = FindWindowEx(IntPtr.Zero, IntPtr.Zero, null, null); StringBuilder className = new StringBuilder(100); StringBuilder windowText = new StringBuilder(100); while (hwnd != IntPtr.Zero) { GetClassName(hwnd, className, 100); if (className.ToString().Contains("EVA_Window_Dblclk")) { GetWindowText(hwnd, windowText, 100); if (windowText.ToString().Contains("카카오톡") || windowText.ToString().Contains("KakaoTalk")) { return hwnd; } } hwnd = FindWindowEx(IntPtr.Zero, hwnd, null, null); } return IntPtr.Zero; } // Ctrl 키 상태를 확인하는 메서드 private bool IsCtrlKeyDown() { const int KEY_MASK = 0xFF80; return (GetKeyState(VK_CONTROL) & KEY_MASK) != 0; } private void button1_Click(object sender, EventArgs e) { SendKakao(textBox1.Text, textBoxErrorTExt1.Text); }