windows7下如何获取MAC地址？ [复制]

可能的重复：
获取机器的 MAC 地址——好的解决方案吗？ https://stackoverflow.com/questions/2069855/getting-machines-mac-address-good-solution
如何使用Delphi获取网卡的MAC地址？ https://stackoverflow.com/questions/577071/how-do-i-get-the-mac-address-of-a-network-card-using-delphi

我使用MAC地址作为硬件ID进行保护（当然我已经加密了这个数据） 我使用下面的代码来获取用户计算机上的 MAC 地址

function MacAddress: string;
var
Lib: Cardinal;
Func: function(GUID: PGUID): Longint; stdcall;
GUID1, GUID2: TGUID;
begin
Result := '';
Lib := LoadLibrary('rpcrt4.dll');
if Lib <> 0 then
begin
   @Func := GetProcAddress(Lib, 'UuidCreateSequential');
   if Assigned(Func) then
   begin
     if (Func(@GUID1) = 0) and
        (Func(@GUID2) = 0) and
        (GUID1.D4[2] = GUID2.D4[2]) and
        (GUID1.D4[3] = GUID2.D4[3]) and
        (GUID1.D4[4] = GUID2.D4[4]) and
        (GUID1.D4[5] = GUID2.D4[5]) and
        (GUID1.D4[6] = GUID2.D4[6]) and
        (GUID1.D4[7] = GUID2.D4[7]) then
     begin
       Result :=
         IntToHex(GUID1.D4[2], 2) + '-' +
         IntToHex(GUID1.D4[3], 2) + '-' +
         IntToHex(GUID1.D4[4], 2) + '-' +
         IntToHex(GUID1.D4[5], 2) + '-' +
         IntToHex(GUID1.D4[6], 2) + '-' +
         IntToHex(GUID1.D4[7], 2);
     end;
   end;
end;
end;

上面的代码在Windows XP上完美运行 但它在windows7中给出了不同的值，每次计算机重新启动后该值都会变化:( 是否有机会获得恒定的 MAC 地址（除非用户更改了他的 MAC 地址） 或者是否有任何好的代码可以在所有操作系统上检索常量数据？

提前致谢

@steve0，检索 MAC 地址网络适​​配器你可以使用WMI和Win32_NetworkAdapterConfiguration http://msdn.microsoft.com/en-us/library/aa394217%28VS.85%29.aspx类并检查MACAddress财产。

检查这个代码：

program WMI_MAC;

{$APPTYPE CONSOLE}


uses
  SysUtils
  ,ActiveX
  ,ComObj
  ,Variants;

 function VarToStrNil(Value:Variant):string;  //Dummy function to onvert an variant value to string
 begin
   if VarIsNull(Value) then
    Result:=''
   else
    Result:=VarToStr(Value);
 end;


Procedure GetMacAddress;
var
  objWMIService : OLEVariant;
  colItems      : OLEVariant;
  colItem       : OLEVariant;
  oEnum         : IEnumvariant;
  iValue        : LongWord;
  wmiHost, root, wmiClass: string;

  function GetWMIObject(const objectName: String): IDispatch;
  var
    chEaten: Integer;
    BindCtx: IBindCtx;//for access to a bind context
    Moniker: IMoniker;//Enables you to use a moniker object
  begin
    OleCheck(CreateBindCtx(0, bindCtx));
    OleCheck(MkParseDisplayName(BindCtx, StringToOleStr(objectName), chEaten, Moniker));//Converts a string into a moniker that identifies the object named by the string
    OleCheck(Moniker.BindToObject(BindCtx, nil, IDispatch, Result));//Binds to the specified object
  end;

begin
  wmiHost       := '.';
  root          := 'root\CIMV2';
  wmiClass      := 'Win32_NetworkAdapterConfiguration';
  objWMIService := GetWMIObject(Format('winmgmts:\\%s\%s',[wmiHost,root]));
  colItems      := objWMIService.ExecQuery(Format('SELECT * FROM %s',[wmiClass]),'WQL',0);
  oEnum         := IUnknown(colItems._NewEnum) as IEnumVariant;
  while oEnum.Next(1, colItem, iValue) = 0 do
  //if VarToStrNil(colItem.MACAddress)<>'' then //uncomment if you only want list the interfaces with mac adress
  //if colItem.IPEnabled then  // uncomment if you only want list the active interfaces
  begin
    WriteLn('Card Description '+VarToStrNil(colItem.Caption));
    WriteLn('MACAddress       '+VarToStrNil(colItem.MACAddress));
  end;
end;

begin
 try
    CoInitialize(nil);
    try         
      GetMacAddress;
      Readln;
    finally
    CoUninitialize;
    end;
 except
    on E:Exception do
    Begin
        Writeln(E.Classname, ': ', E.Message);
        Readln;
    End;
  end;
end.