MessageBox using reflection for parameters

MessageBox2.cs

// The real API method imported from Windows
[DllImport(“user32.dll”)]
static extern uint MessageBox(IntPtr hWndParent, string msg, string title, uint options);

// Implementation method exported to 16-bit code
[EntryPoint(0x0001)]
public ushort MessageBox(ushort hWndParent, string msg, string title, ushort options)
{
    // No more messing around with the VM stack for parameters
    // nor with the ax register for the return value. Nice!
    return (ushort)MessageBox(IntPtr.Zero, msg, title, (uint)options);
}