winform 在win7环境下 单独隐藏或者禁用左下角的开始菜单 保留其他

winform 在win7环境下 隐藏或者禁用左下角的开始菜单
[DllImport("user32.dll")]
public static extern bool GetCursorPos(ref Point lpPoint);

    [DllImport("user32.dll", EntryPoint = "FindWindowEx", SetLastError = true)]
    public static extern IntPtr FindWindowEx(IntPtr hwndParent, IntPtr hwndChildAfter, string lpszClass, string lpszWindow);

    [DllImport("user32.dll", EntryPoint = "ShowWindow", SetLastError = true)]
    public static extern bool ShowWindow(IntPtr hWnd, uint nCmdShow);

    public static Point GetCursorPos()
    {
        Point point = new Point();
        GetCursorPos(ref point);
        return point;
    }

    public static void HideTask(bool isHide)
    {
        try
        {
            IntPtr trayHwnd = FindWindowEx(IntPtr.Zero, IntPtr.Zero, "Shell_TrayWnd", null);
            IntPtr hStar = FindWindowEx(IntPtr.Zero, IntPtr.Zero, "Button", null);

            if (isHide)
            {
                ShowWindow(trayHwnd, 0);
                ShowWindow(hStar, 0);
            }
            else
            {
                ShowWindow(trayHwnd, 1);
                ShowWindow(hStar, 1);
            }
        }
        catch { }
    }

            这种方法会连其他任务一起消失  求有没有其他办法  小弟没分了

ShowWindow(trayHwnd, 0);
这行去掉