C# 카카오톡 핸들 찾기

using System;
using System.Runtime.InteropServices;
using System.Threading;
using System.Windows.Forms;
 
namespace WindowsFormsApp1
{
    public partial class Form1 : Form
    {
        [DllImport("user32.dll")]
        private static extern int FindWindow(string lpClassName, string lpWindowName);
 
        [DllImport("user32.dll")]
        public static extern int FindWindowEx(int hWnd1, int hWnd2, string lpsz1, string lpsz2);
 
        [DllImport("user32.dll")]
        public static extern int SendMessage(int hwnd, int wMsg, int wParam, string lParam);
 
        [DllImport("user32.dll")]
        public static extern uint PostMessage(int hwnd, int wMsg, int wParam, int lParam);
 
        [DllImport("user32.dll")]
        private static extern bool SetForegroundWindow(int hWnd);
 
        const int WM_KEYDOWN = 0x100;
        const int WM_KEYUP = 0x101;
        const Int32 VK_RETURN = 0x0D;
        const int VK_ENTER = 0x0D;
 
        int msgCount = 0;
 
        public Form1()
        {
            InitializeComponent();
            
            SendMessage("현준혁", "TEST");
        }
 
        public void SendMessage(string title, string msg)
        {
            while (true)
            {
                msgCount += 1;
                int hd01 = FindWindow(null, title);
                SetForegroundWindow(hd01);
                int hd03 = FindWindowEx(hd01, 0, "RichEdit50W", "");
                SendMessage(hd03, 0x000c, 0, msg + "/" + msgCount.ToString());
                PostMessage(hd03, 0x0100, 0xD, 0x1C001);
                Thread.Sleep(500);
                //SendMessage(0x00330B74, 0x000c, 0, msg + "/" + msgCount.ToString());
            }
        }
    }
}