Desarrollo de aplicación a pantalla completa

[Peterpay]

en el load o en el diseñador de tu form ponle no se una combinacion seria:


- FormBorderStyle=NONE
- WindowsState=Maximized

o apoyarte del api de windows como este amigo para ocultar el taskbar y asi si tener una aplicacion completamente fullscreen.

Código:

/// <remarks> Apache License Information
///
///  Copyright 2008 Chris DiBona
///
///   Licensed under the Apache License, Version 2.0 (the "License");
///   you may not use this file except in compliance with the License.
///   You may obtain a copy of the License at
///
///     http://www.apache.org/licenses/LICENSE-2.0
///
///   Unless required by applicable law or agreed to in writing, software
///   distributed under the License is distributed on an "AS IS" BASIS,
///   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
///   See the License for the specific language governing permissions and
///   limitations under the License.
/// </remarks>

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;
using System.Runtime.InteropServices; // Important!

namespace FullScreenExample
{
    public partial class Form1 : Form
    {
        [DllImport("user32.dll")]
        private static extern int FindWindow(string lpszClassName, string lpszWindowName);
        [DllImport("user32.dll")]
        private static extern int ShowWindow(int hWnd, int nCmdShow);
        private const int SW_HIDE = 0;
        private const int SW_SHOW = 1;

        private void full_maximize(object sender, EventArgs e)
        {
            // First, Hide the taskbar

            int hWnd = FindWindow("Shell_TrayWnd", "");
            ShowWindow(hWnd, SW_HIDE);

            // Then, format and size the window. 
            // Important: Borderstyle -must- be first, 
            // if placed after the sizing functions, 
            // it'll strangely firm up the taskbar distance.

            FormBorderStyle = FormBorderStyle.None;
            this.Location = new Point(0, 0);
            this.WindowState = FormWindowState.Maximized;

            //        The following is optional, but worth knowing.

            //        this.Size = new Size(Screen.PrimaryScreen.Bounds.Width, Screen.PrimaryScreen.Bounds.Height);
            //        this.TopMost = true;
        }

        public Form1()
        {
            InitializeComponent();
        }

        private void Form1_Load(object sender, EventArgs e)
        {
            full_maximize(sender, e);
        }

        private void Form1_FormClosing(object sender, FormClosingEventArgs e)
        {

            // Important, re-show Show Window, you know, you should probably
            // Also add a handler if the app is minimized, or loses focus, otherwise
            // Your users will be taskbarless.

            int hwnd = FindWindow("Shell_TrayWnd", "");
            ShowWindow(hwnd, SW_SHOW);
        }
    }
}