using System;
using System.Runtime.InteropServices;
class MainClass
{
[DllImport("user32.dll", CharSet = CharSet.Auto)]
public static extern int MessageBox(int hWnd, String text, String caption, uint type);
[STAThread]
static void Main(string[] args)
{
MessageBox(0, "Hello World", "MyBox", 1);
}
}