Something

using System.Diagnostics;
using System.Windows.Forms;
using System.Drawing;
using System;

class Test
{
	static void Main ()
	{
		Application.Run (new MyForm ());
	}

	public class MyForm : Form
	{
		public MyForm ()
		{
			Button b = new Button ();
			b.Click += new EventHandler (b_Click);
			this.Controls.Add (b);
		}

		void b_Click (object sender, EventArgs e)
		{
			this.MinimizeBox = !this.MinimizeBox;
			this.MaximizeBox = !this.MaximizeBox;
		}
	}
}