Get text cell by cell in listview of another process

<pre>[DllImport("user32.dll")]
        static extern IntPtr SendMessage(IntPtr hWnd, int Msg, IntPtr wParam, IntPtr lParam);
        [DllImport("user32.dll", CharSet = CharSet.Auto, SetLastError = false) ]
        static extern IntPtr SendMessage(IntPtr hWnd, Int32 Msg, IntPtr wParam, StringBuilder lParam);
 //
        [DllImport("user32.dll", SetLastError = true)]
        static public extern uint GetWindowThreadProcessId(IntPtr hWnd, out uint lpdwProcessId);
        [DllImport("kernel32.dll")]
        static public extern IntPtr OpenProcess(uint dwDesiredAccess, [MarshalAs(UnmanagedType.Bool)] bool bInheritHandle, int dwProcessId);       
        [DllImport("kernel32.dll")]
        static public extern bool WriteProcessMemory(IntPtr hProcess, IntPtr lpBaseAddress, ref TvItem buffer, int dwSize, IntPtr lpNumberOfBytesWritten);
        [DllImport("kernel32.dll")]
        static public extern bool ReadProcessMemory(IntPtr hProcess, IntPtr lpBaseAddress, IntPtr lpBuffer, int dwSize, IntPtr lpNumberOfBytesRead);
        [DllImport("kernel32.dll", SetLastError = true, ExactSpelling = true)]
        static public extern bool VirtualFreeEx(IntPtr hProcess, IntPtr lpAddress, int dwSize, uint dwFreeType);
        [DllImport("kernel32.dll")]
        static public extern bool CloseHandle(IntPtr hObject);
        [DllImport("kernel32.dll", SetLastError = true, ExactSpelling = true)]
        static public extern IntPtr VirtualAllocEx(IntPtr hProcess, IntPtr lpAddress, uint dwSize, uint flAllocationType, uint flProtect); 
        
private void GetTextMonitor()
        {
            IntPtr hWnd = FindWindow(null, "Internet Download Manager 5.14");
            IntPtr hWndList = FindWindowEx(hWnd, IntPtr.Zero, null, null);

            int rowCount = (int)SendMessage(hWndList, LVM_GETITEMCOUNT, IntPtr.Zero, IntPtr.Zero);
            string[] lbItems = new string[rowCount];
            label1.Text = "Parent:" + hWnd + ", Child:" + hWndList;
            label2.Text = "ListRow: " + rowCount + " " +
                (int)SendMessage(hWndList, 0x1003, IntPtr.Zero, IntPtr.Zero);
            for (int index = 0; index < rowCount; index++)
            {               
                string[] cells = new string[10]; 
                for (int a = 0; a < 10; a++) 
                {
                   cells[a] = GetListViewItem(hWndList, index, a).ToLower();
                   label2.Text += cells[a].ToString() +"\n";
                } 
            }
        }


 static private string GetListViewItem(IntPtr hWnd, int index, int subitem) 
        { 
            LvItem lvItem = new LvItem(); 
            IntPtr lpLocalBuffer = Marshal.AllocHGlobal(1024); 
            uint pid; 
            GetWindowThreadProcessId(hWnd, out pid); 
            IntPtr hProcess = OpenProcess(0x001f0fff, false, (int)pid); 
            IntPtr lpRemoteBuffer = VirtualAllocEx(hProcess, IntPtr.Zero, 1024, 0x1000, 4); 
            lvItem.mask = 1; 
            lvItem.iItem = index; 
            lvItem.iSubItem = subitem; 
            lvItem.pszText = (IntPtr)((int)lpRemoteBuffer + Marshal.SizeOf(typeof(LvItem))); 
            lvItem.cchTextMax = 50;             
            //WriteProcessMemory(hProcess, lpRemoteBuffer, ref lvItem, Marshal.SizeOf(typeof(LvItem)), (IntPtr)0); 
            SendMessage(hWnd, 0x1005, IntPtr.Zero, lpRemoteBuffer);
            ReadProcessMemory(hProcess, lpRemoteBuffer, lpLocalBuffer, 1024, (IntPtr)0); 
            string ret = Marshal.PtrToStringAnsi((IntPtr)((int)lpLocalBuffer + Marshal.SizeOf(typeof(LvItem)))); 
            Marshal.FreeHGlobal(lpLocalBuffer); 
            VirtualFreeEx(hProcess, lpRemoteBuffer, 0, 0x8000); 
            CloseHandle(hProcess); 
            return ret; 
        }