MASQUER, AFFICHER LA BARRE DE MENU

Première Methode
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    public static class pdaTaskBar
    {
        [DllImport("Coredll.dll", EntryPoint = "FindWindow")]
        private static extern System.IntPtr FindWindow(string lpClassName, string lpWindowName);

        [DllImport("Coredll.dll", EntryPoint = "SetWindowPos", SetLastError = true)]
        private static extern bool SetWindowPos(System.IntPtr IntPtr, System.IntPtr hWndInsertAfter, int X, int Y, int cx, int cy, int uFlags);

        const int TASKBAR_SHOW = 0x40;
        const int TASKBAR_HIDE = 0x64;

        public static void HideTaskbar()
        {
            IntPtr taskBarHandle;
            taskBarHandle = FindWindow("HHTaskBar", "");
            SetWindowPos(taskBarHandle, IntPtr.Zero, 0, 0, 0, 0, TASKBAR_HIDE);
        }
        public static void ShowTaskbar()
        {
            IntPtr taskBarHandle;
            IntPtr HWND_TOPMOST = new IntPtr(-1);

            taskBarHandle = FindWindow("HHTaskBar", "");
            SetWindowPos(taskBarHandle, HWND_TOPMOST, 0, 295, 240, 25, TASKBAR_SHOW);

            //Pourrait eventuellement fonctionner
            //IntPtr taskBarHandle;
            //taskBarHandle = FindWindow("shell_traywnd", "");
            //SetWindowPos(taskBarHandle, IntPtr.Zero, 0, 0, 0, 0, TASKBAR_SHOW);
        }
    }
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Seconde Methode

    public static class pdaTaskVisibility
    {
       
        private const int SW_HIDE = 0x00;

        private const int SW_SHOW = 0x0001;

        [DllImport("coredll.dll", CharSet = CharSet.Auto)]

        private static extern IntPtr FindWindow(string lpClassName, string lpWindowName);

        [DllImport("coredll.dll", CharSet = CharSet.Auto)]

        private static extern bool ShowWindow(IntPtr hwnd, int nCmdShow);

        [DllImport("coredll.dll", CharSet = CharSet.Auto)]

        private static extern bool EnableWindow(IntPtr hwnd, bool enabled);

        public static void ShowTaskbar()
        {

            IntPtr h = FindWindow("HHTaskBar", "");

            ShowWindow(h, SW_SHOW);

            EnableWindow(h, true);

        }
        public static void HideTaskbar()
        {

            IntPtr h = FindWindow("HHTaskBar", "");

            ShowWindow(h, SW_HIDE);

            EnableWindow(h, false);

        }
    }
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