ulong installedMemory = 0;

            ChitrakshLibrary.API.MEMORYSTATUSEX memStatus = new ChitrakshLibrary.API.MEMORYSTATUSEX();

            if (ChitrakshLibrary.API.Win32Wrapper.GlobalMemoryStatusEx(memStatus))

            {

                textBox1.Text = "";

                

                installedMemory = memStatus.ullTotalPhys;

                textBox1.Text = "Total Memory=" + ChitrakshLibrary.CommonMethod.getSizeInMB_Or_GB(memStatus.ullTotalPhys);

                textBox1.Text = textBox1.Text + " Avialable Memory=" + ChitrakshLibrary.CommonMethod.getSizeInMB_Or_GB(memStatus.ullAvailPhys);

                textBox1.Text = textBox1.Text + " Used Memory=" + ChitrakshLibrary.CommonMethod.getSizeInMB_Or_GB(memStatus.ullTotalPhys - memStatus.ullAvailPhys);

               

                decimal c = (decimal)memStatus.ullTotalPhys - memStatus.ullAvailPhys;

                decimal d = memStatus.ullTotalPhys;

                decimal f = Math.Round((c / d) * 100, 0);

                progressBar1.Minimum = 0;

                progressBar1.Maximum = 100;

                progressBar1.Value = (int)(f);

                

                label2.Text = f.ToString() + "%";

            }

the API definitions are as under

 

public class MEMORYSTATUSEX

    {

        public uint dwLength;

        public uint dwMemoryLoad;

        public ulong ullAvailExtendedVirtual;

        public ulong ullAvailPageFile;

        public ulong ullAvailPhys;

        public ulong ullAvailVirtual;

        public ulong ullTotalPageFile;

        public ulong ullTotalPhys;

        public ulong ullTotalVirtual;

        public MEMORYSTATUSEX();

    }

and function is

public extern static bool GlobalMemoryStatusEx(MEMORYSTATUSEX lpBuffer);

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