C#

// NativeMethods.cs

using System;
using System.Text;
using System.Runtime.InteropServices;

namespace ConsoleApplicationTest
{
    internal static class NativeMethods
    {
        [DllImport("User32.dll")]
        public static extern IntPtr GetForegroundWindow();

        [DllImport("User32.dll")]
        public static extern int GetWindowText(IntPtr hWnd, StringBuilder lpString, int nMaxCount);
    }
}

// Program.cs

using System;
using System.Text;

namespace ConsoleApplicationTest
{
    class Program
    {
        static void Main(string[] args)
        {
            Console.WriteLine("Press any key to get text");
            Console.ReadKey();
            IntPtr handle = NativeMethods.GetForegroundWindow();
            if (handle != IntPtr.Zero)
            {
                StringBuilder builder = new StringBuilder(255);
                NativeMethods.GetWindowText(handle, builder, builder.Capacity);
                Console.WriteLine(builder.ToString());
            }
            Console.ReadKey();
        }
    }
}

bonosa wrote:

6. FRom Proj2 Debug menu, i tried "Attach to Process" the running process proj1.exe

Mycontrol.DisplayFormat = "Total: {0:F3}";

C: Displays numeric values in currency format.
D: Displays numeric values in decimal format.
E: Displays numeric values in scientific (exponential) format.
F: Displays numeric values in fixed format.
G: Displays numeric values in general format.
N: Displays numeric values in number format.
X: Displays numeric values in hexadecimal format.