disabling and/or hiding Windows taskbar

disabling and/or hiding Windows taskbar

• Arun-YEG

  I don't know where to include [DllImport("user32.dll")]. In which part of the source code
  

• hoy

  Do you get any exception
  
  I have tested this class on Windows XP, here is the code:
  
  

  public class Taskbar { [DllImport( "user32.dll" )] private static extern int FindWindow( string className, string windowText ); [DllImport( "user32.dll" )] private static extern int ShowWindow( int hwnd, int command ); private const int SW_HIDE = 0; private const int SW_SHOW = 1; protected static int Handle { get { return FindWindow( "Shell_TrayWnd", "" ); } } private Taskbar() { // hide ctor } public static void Show() { ShowWindow( Handle, SW_SHOW ); } public static void Hide() { ShowWindow( Handle, SW_HIDE ); } }

  
  
  Using:
  

  /// <summary> /// The main entry point for the application. /// </summary> [STAThread] static void Main() { Taskbar.Hide(); Application.ApplicationExit += new EventHandler( Application_ApplicationExit ); Application.EnableVisualStyles(); Application.SetCompatibleTextRenderingDefault(false); Application.Run(new FrmMain()); } static void Application_ApplicationExit( object sender, EventArgs e ) { Taskbar.Show(); }

  
  
  
  

• cadi

  I am not sure that above is real solution.
  
  If you want true Full Screen app, you need to request it from WinAPI.
  
  Detailed explanation is here:
  
  How to make Windows Form app truly Full Screen (and to hide Taskbar) in C#
  
  (based on: KB Article Q179363: How To Cover the Task Bar with a Window )
  
  Most important piece of code is:
  

  public class WinApi
  {
    [DllImport(”user32.dll”, EntryPoint = “GetSystemMetrics”)]
    public static extern int GetSystemMetrics(int which);
  
    [DllImport(”user32.dll”)]
    public static extern void
      SetWindowPos(IntPtr hwnd, IntPtr hwndInsertAfter,
             int X, int Y, int width, int height, uint flags);    
  
    private const int SM_CXSCREEN = 0;
    private const int SM_CYSCREEN = 1;
    private static IntPtr HWND_TOP = IntPtr.Zero;
    private const int SWP_SHOWWINDOW = 64; // 0×0040
  
    public static int ScreenX
    {
      get { return GetSystemMetrics(SM_CXSCREEN);}
    }
  
    public static int ScreenY
    {
      get { return GetSystemMetrics(SM_CYSCREEN);}
    }
  
    public static void SetWinFullScreen(IntPtr hwnd)
    {
      SetWindowPos(hwnd, HWND_TOP, 0, 0, ScreenX, ScreenY, SWP_SHOWWINDOW);
    }
  }

  --

  Regards,

  Dejan Vesi

  MCP & MCAD for .Net technologies

  Home: http://www.vesic.org/english/

  Blog: http://www.vesic.org/english/blog/

  
  
  

• MikeElliott

  The P/Invoke needs:
  
  

  [DllImport("user32.dll")] private static extern int FindWindow(string className, string windowText); [DllImport("user32.dll")] private static extern int ShowWindow(int hwnd, int command); private const int SW_HIDE = 0; private const int SW_SHOW = 1;

  
  
  Usage:
  
  

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

  
  
  
  

• buick27

  first use
  
  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; // add this
  
  namespace server_1._
  {
  public partial class Form1 : Form
  {
  [DllImport("user32.dll")]
  
  
  Good luck!!
  
  
  

• PGI Dev

  You must specify the dll for every external method.
  
  
  

• Koos Brandt

  Why do you import user32.dll two times...I dont get this
  
  

• Ulzii

  Helper class:
  

  using System; using System.Runtime.InteropServices; public class Taskbar { [DllImport("user32.dll")] private static extern int FindWindow(string className, string windowText); [DllImport("user32.dll")] private static extern int ShowWindow(int hwnd, int command); private const int SW_HIDE = 0; private const int SW_SHOW = 1; private int _taskbarHandle; public Taskbar() { _taskbarHandle = FindWindow("Shell_TrayWnd",""); } public void Show() { ShowWindow(_taskbarHandle, SW_SHOW); } public void Hide() { ShowWindow(_taskbarHandle, SW_HIDE); } }

  
  
  Using:
  

  Taskbar taskbar = new Taskbar(); taskbar.Hide();

  
  
  
  

• pharries

  Thanks alot, that put me in the right direction I think. Though there's still one problem for me - the place where the taskbar was just leaves a "black hole" where the program doesn't react to any mouse clicks. Isn't there any way which I can maximize the program to the fullscreen, over that "black hole" or just register mouse clicks in that area Thanks in advance, Peter
  

• Ron L.

  It doesn't work!
  

• Kerem Baser

  Thanks for the detailed breakdown. This was exactly what I was looking for.
  
• disabling and/or hiding Windows taskbar