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    <p>I had to write something similar a little while ago because I was using a number of hardware parameters for "activation" of my software.</p> <p>Have a look at, <a href="http://msdn.microsoft.com/en-us/library/windows/hardware/ff548975%28v=vs.85%29.aspx" rel="noreferrer">DeviceIoControl</a> &amp; <a href="http://msdn.microsoft.com/en-us/library/windows/hardware/ff569069%28v=vs.85%29.aspx" rel="noreferrer">OID_802_3_PERMANENT_ADDRESS</a>. Its a lot of interop code (my class for handling it is approximatley 200 lines), but it gets me the hardware code guaranteed.</p> <p>Some code snippets to get you going,</p> <pre><code>private const uint IOCTL_NDIS_QUERY_GLOBAL_STATS = 0x170002; [DllImport("Kernel32.dll", CharSet = CharSet.Auto, SetLastError = true)] private static extern bool DeviceIoControl( SafeFileHandle hDevice, uint dwIoControlCode, ref int InBuffer, int nInBufferSize, byte[] OutBuffer, int nOutBufferSize, out int pBytesReturned, IntPtr lpOverlapped); [DllImport("kernel32.dll", SetLastError = true, CharSet = CharSet.Auto)] internal static extern SafeFileHandle CreateFile( string lpFileName, EFileAccess dwDesiredAccess, EFileShare dwShareMode, IntPtr lpSecurityAttributes, ECreationDisposition dwCreationDisposition, EFileAttributes dwFlagsAndAttributes, IntPtr hTemplateFile); [Flags] internal enum EFileAccess : uint { Delete = 0x10000, ReadControl = 0x20000, WriteDAC = 0x40000, WriteOwner = 0x80000, Synchronize = 0x100000, StandardRightsRequired = 0xF0000, StandardRightsRead = ReadControl, StandardRightsWrite = ReadControl, StandardRightsExecute = ReadControl, StandardRightsAll = 0x1F0000, SpecificRightsAll = 0xFFFF, AccessSystemSecurity = 0x1000000, // AccessSystemAcl access type MaximumAllowed = 0x2000000, // MaximumAllowed access type GenericRead = 0x80000000, GenericWrite = 0x40000000, GenericExecute = 0x20000000, GenericAll = 0x10000000 } // Open a file handle to the interface using (SafeFileHandle handle = FileInterop.CreateFile(deviceName, FileInterop.EFileAccess.GenericRead | FileInterop.EFileAccess.GenericWrite, 0, IntPtr.Zero, FileInterop.ECreationDisposition.OpenExisting, 0, IntPtr.Zero)) { int bytesReturned; // Set the OID to query the permanent address // http://msdn.microsoft.com/en-us/library/windows/hardware/ff569074(v=vs.85).aspx int OID_802_3_PERMANENT_ADDRESS = 0x01010101; // Array to capture the mac address var address = new byte[6]; if (DeviceIoControl(handle, IOCTL_NDIS_QUERY_GLOBAL_STATS, ref OID_802_3_PERMANENT_ADDRESS, sizeof(uint), address, 6, out bytesReturned, IntPtr.Zero)) { // Attempt to parse the MAC address into a string // any exceptions will be passed onto the caller return BitConverter.ToString(address, 0, 6); } } </code></pre>
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    1. POHow to detect the original MAC address after it has been spoofed?
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    1. USM Afifi
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    1. COThis looks promising. Thanks :) I'll test and let you know.
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      1. USSajib Mahmood
    2. CO@SajibMahmood let me know if you get stuck. In my software it has run over 150,000 machines on over 250 different computer hardware. It always captured the mac address. You won't get that success rate unfortunately with WMI.
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    3. CO@SajibMahmood any luck?
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