c#控制系统任务栏的自动隐藏与显示

public struct RECT
    {
        public int Left;
        public int Top;
        public int Right;
        public int Bottom;
    }
    public struct APPBARDATA
    {
        public int cbSize;
        public int hwnd;
        public int uCallbackMessage;
        public int uEdge;
        public RECT rc;
        public int lParam;
    }

        public const int ABS_ALWAYSONTOP = 0x002;
        public const int ABS_AUTOHIDE = 0x001;
        public const int ABS_BOTH = 0x003;
        public const int ABM_ACTIVATE = 0x006;
        public const int ABM_GETSTATE = 0x004;
        public const int ABM_GETTASKBARPOS = 0x005;
        public const int ABM_NEW = 0x000;
        public const int ABM_QUERYPOS = 0x002;
        public const int ABM_SETAUTOHIDEBAR = 0x008;
        public const int ABM_SETSTATE = 0x00A;

        ///
        /// 向系统任务栏发送消息
        ///
        [DllImport("shell32.dll")]
        public static extern int SHAppBarMessage(int dwmsg, ref APPBARDATA app);

        [DllImport("user32.dll", EntryPoint = "FindWindow")]
        public static extern int FindWindow(string lpClassName, string lpWindowName);

        ///
        /// 设置系统任务栏是否自动隐藏
        ///
        ///

True 设置为自动隐藏，False 取消自动隐藏
        public static void SetAppBarAutoDisplay(bool IsAuto)
        {
            APPBARDATA abd = new APPBARDATA();
            abd.hwnd = FindWindow("Shell_TrayWnd", "");
            //abd.lParam = ABS_ALWAYSONTOP Or ABS_AUTOHIDE   '自动隐藏,且位于窗口前
            //abd.lParam = ABS_ALWAYSONTOP                   '不自动隐藏,且位于窗口前
            //abd.lParam = ABS_AUTOHIDE                       '自动隐藏,且不位于窗口前
            if (IsAuto)
            {
                abd.lParam = ABS_AUTOHIDE;
                SHAppBarMessage(ABM_SETSTATE, ref abd);
            }
            else
            {
                abd.lParam = ABS_ALWAYSONTOP;
                SHAppBarMessage(ABM_SETSTATE, ref abd);
            }
        }

 

在XP与2003系统下测试通过！