form1.cs

Max window..............................................................................

using System;
using System.Drawing;
using System.Collections;
using System.ComponentModel;
using System.Windows.Forms;
using System.Data;

namespace FullScreenMode
{
	/// <summary>
	/// Summary description for Form1.
	/// </summary>
	public class Form1 : System.Windows.Forms.Form
	{
		/// <summary>
		/// Required designer variable.
		/// </summary>
		private System.ComponentModel.Container components = null;

		private bool _bFullScreenMode = false;

		public Form1()
		{
			//
			// Required for Windows Form Designer support
			//
			InitializeComponent();

			//
			// TODO: Add any constructor code after InitializeComponent call
			//
		}

		/// <summary>
		/// Clean up any resources being used.
		/// </summary>
		protected override void Dispose( bool disposing )
		{
			if( disposing )
			{
				if (components != null) 
				{
					components.Dispose();
				}
			}
			base.Dispose( disposing );
		}

		#region Windows Form Designer generated code
		/// <summary>
		/// Required method for Designer support - do not modify
		/// the contents of this method with the code editor.
		/// </summary>
		private void InitializeComponent()
		{
			// 
			// Form1
			// 
			this.AutoScaleBaseSize = new System.Drawing.Size(5, 13);
			this.ClientSize = new System.Drawing.Size(392, 266);
			this.KeyPreview = true;
			this.Name = "Form1";
			this.Text = "Form1";
			this.KeyPress += new System.Windows.Forms.KeyPressEventHandler(this.Form1_KeyPress);
			this.KeyUp += new System.Windows.Forms.KeyEventHandler(this.Form1_KeyUp);

		}
		#endregion

		/// <summary>
		/// The main entry point for the application.
		/// </summary>
		[STAThread]
		static void Main() 
		{
			Application.Run(new Form1());
		}

		private void Form1_KeyPress(object sender, System.Windows.Forms.KeyPressEventArgs e)
		{
		
		}

		private void Form1_KeyUp(object sender, System.Windows.Forms.KeyEventArgs e)
		{
			if ( e.KeyData == Keys.F11)
			{

				if (_bFullScreenMode == false)
				{
					Form2 f = new Form2();

					this.Owner = f;

					this.FormBorderStyle = FormBorderStyle.None;

					this.Left = (Screen.PrimaryScreen.Bounds.Width/2 - this.Width/2);

					this.Top = (Screen.PrimaryScreen.Bounds.Height/2 - this.Height/2);

					f.Show();

					_bFullScreenMode = true;

					f.KeyUp +=new KeyEventHandler(Form1_KeyUp);
				}
				else
				{
					Form f = this.Owner;
					this.Owner = null;

					f.Close();
					
					this.FormBorderStyle = FormBorderStyle.Sizable;
				}
			}
		}
	}
}