private void timer1_Tick(object sender, EventArgs e)
        {
            MEMORY_INFO MemInfo;

            MemInfo = new MEMORY_INFO();
            SystemUnit.GlobalMemoryStatus(ref MemInfo);
            toolRAM.Text = MemInfo.dwMemoryLoad.ToString() + "%";
        }
 public static extern void GlobalMemoryStatus(ref MEMORY_INFO meminfo);