using System.Runtime.InteropServices;
 
class Hello
{
     [DllImport("user32.dll")]
     private extern static uint MessageBox(uint hWnd, string lpText, string lpTitle, uint uType);
     static void Main(string[] args)
    {
        MessageBox( 0, "Hello, Win32 API(MSIL) World!", "Hello, World!", 0 );
    }
}