C#

IntPtr hwnd;
           hwnd = FindWindow("ParentClass", "ParentTitle");

            WindowsEnumerator enumerator = new WindowsEnumerator();
            foreach (ApiWindow top in enumerator.GetTopLevelWindows())
            {

                foreach (ApiWindow child in enumerator.GetChildWindows(top.hWnd))
                    MessageBox.Show("Child Window = " + child.MainWindowTitle + ", Child ClassName = " + child.ClassName);

            }

IntPtr Chd_win = IntPtr.Zero;
                           Chd_win = FindWindowEx(hwnd_Parent, Chd_win, "ChildWindow_Class", "ChildWindow_Tiltle");  // From one of the found Child Window in #1

                           GetWindowRect(Chd_win, out rect);

                            MessageBox.Show("Child = " + Chd_win.ToString() + ": TopLeft_X = " + rect.Left.ToString() + ", TopLeft_Y = " + rect.Top.ToString());

myDll.h

#ifndef _MYDLL_H
#define _MYDLL_H

extern "C" _declspec(dllexport)  char* __stdcall getName();

#endif 

myDll.cpp

#include "stdafx.h"

#include "mydll.h"

extern "C" __declspec(dllexport) char* __stdcall getName()
{
	return "Hello !!!";
}

using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
using System.Runtime.InteropServices;

namespace sysWinApp
{
    public partial class Form1 : Form
    {
        [DllImport("myDll.dll")]
        static extern string getName();

        
        public Form1()
        {
            InitializeComponent();
        }

        private void button1_Click(object sender, EventArgs e)
        {
            label1.Text = getName();
        }
    }
}

//this variable indicates the current language in use
    CultureInfo CurrentLocale;

    public Form1()
    {
        InitializeComponent();
        valueInit();
        //MessageBox.Show(rfidCard.PORT + "");
    }


    //Lets start adding the multilingual code here




    //change the language in real time 
    private void ChangeLanguage(string lang)
    {
        CurrentLocale = new CultureInfo(lang);
        foreach (Control c in this.Controls)
        {
            ComponentResourceManager resources = new ComponentResourceManager(typeof(Form1));
            resources.ApplyResources(c, "$this");
            RefreshResources(this, resources);
        }
    }

    //refresh all the controls e sub-controls of the form 
    private void RefreshResources(Control ctrl, ComponentResourceManager res)
    {
        ctrl.SuspendLayout();
        res.ApplyResources(ctrl, ctrl.Name, CurrentLocale);
        foreach (Control control in ctrl.Controls)
            RefreshResources(control, res); // recursion
        ctrl.ResumeLayout(false);
    }

    private void englishToolStripMenuItem_Click(object sender, EventArgs e)
    {
        ChangeLanguage("en-US");
    }

    private void arabicToolStripMenuItem_Click(object sender, EventArgs e)
    {
        ChangeLanguage("ar-SA");
    }

    private void koreanToolStripMenuItem_Click(object sender, EventArgs e)
    {
        ChangeLanguage("ko-KR");
    }

    // the code ends here

gr.DrawImageUnscaledAndClipped(img, rect);