请问如何获取本机的DNS?(5分)

请问如何获取本机的DNS?用什么控件请指教，谢谢

看看老帖子!

难道就没人知道吗？[?]
听说可以从注册表里读出来不知道怎么实现本机的DNS和网关?

{获取本机的DNS}
unit GetDnsList;

interface

uses
Windows, Messages, SysUtils, Classes, Graphics, Controls, Forms, Dialogs,
StdCtrls;

type
TIPMainForm = class(TForm)
Info: TMemo;
Button1: TButton;
procedure Button1Click(Sender: TObject);
procedure FormCreate(Sender: TObject);
private
{ Private declarations }
public
{ Public declarations }
Procedure GetNetworkParameters;
Procedure GetAdapterInformation;
end;

var
IPMainForm: TIPMainForm;
aDnsList:TStrings;
implementation

{$R *.DFM}

Const
MAX_HOSTNAME_LEN = 128; { from IPTYPES.H }
MAX_DOMAIN_NAME_LEN = 128;
MAX_SCOPE_ID_LEN = 256;
MAX_ADAPTER_NAME_LENGTH = 256;
MAX_ADAPTER_DESCRIPTION_LENGTH = 128;
MAX_ADAPTER_ADDRESS_LENGTH = 8;

Type
TIPAddressString = Array[0..4*4-1] of Char;

PIPAddrString = ^TIPAddrString;
TIPAddrString = Record
Next : PIPAddrString;
IPAddress : TIPAddressString;
IPMask : TIPAddressString;
Context : Integer;
End;

PFixedInfo = ^TFixedInfo;
TFixedInfo = Record { FIXED_INFO }
HostName : Array[0..MAX_HOSTNAME_LEN+3] of Char;
DomainName : Array[0..MAX_DOMAIN_NAME_LEN+3] of Char;
CurrentDNSServer : PIPAddrString;
DNSServerList : TIPAddrString;
NodeType : Integer;
ScopeId : Array[0..MAX_SCOPE_ID_LEN+3] of Char;
EnableRouting : Integer;
EnableProxy : Integer;
EnableDNS : Integer;
End;

PIPAdapterInfo = ^TIPAdapterInfo;
TIPAdapterInfo = Record { IP_ADAPTER_INFO }
Next : PIPAdapterInfo;
ComboIndex : Integer;
AdapterName : Array[0..MAX_ADAPTER_NAME_LENGTH+3] of Char;
Description : Array[0..MAX_ADAPTER_DESCRIPTION_LENGTH+3] of Char;
AddressLength : Integer;
Address : Array[1..MAX_ADAPTER_ADDRESS_LENGTH] of Byte;
Index : Integer;
_Type : Integer;
DHCPEnabled : Integer;
CurrentIPAddress : PIPAddrString;
IPAddressList : TIPAddrString;
GatewayList : TIPAddrString;
DHCPServer : TIPAddrString;
HaveWINS : Bool;
PrimaryWINSServer : TIPAddrString;
SecondaryWINSServer : TIPAddrString;
LeaseObtained : Integer;
LeaseExpires : Integer;
End;

Function GetNetworkParams(FI : PFixedInfo; Var BufLen : Integer) : Integer;
StdCall; External 'iphlpapi.dll' Name 'GetNetworkParams';

Function GetAdaptersInfo(AI : PIPAdapterInfo; Var BufLen : Integer) : Integer;
StdCall; External 'iphlpapi.dll' Name 'GetAdaptersInfo';

procedure TIPMainForm.GetAdapterInformation;
Var
AI,Work : PIPAdapterInfo;
Size : Integer;
Res : Integer;
I : Integer;

Function MACToStr(ByteArr : PByte; Len : Integer) : String;
Begin
Result := '';
While (Len > 0) do Begin
Result := Result+IntToHex(ByteArr^,2)+'-';
ByteArr := Pointer(Integer(ByteArr)+SizeOf(Byte));
Dec(Len);
End;
SetLength(Result,Length(Result)-1); { remove last dash }
End;

Function GetAddrString(Addr : PIPAddrString) : String;
Begin
Result := '';
While (Addr <> nil) do Begin
Result := Result+'A: '+Addr^.IPAddress+' M: '+Addr^.IPMask+#13;
Addr := Addr^.Next;
End;
End;

Function TimeTToDateTimeStr(TimeT : Integer) : String;
Const UnixDateDelta = 25569; { days between 12/31/1899 and 1/1/1970 }
Var
DT : TDateTime;
TZ : TTimeZoneInformation;
Res : DWord;

Begin
If (TimeT = 0) Then Result := ''
Else Begin
{ Unix TIME_T is secs since 1/1/1970 }
DT := UnixDateDelta+(TimeT / (24*60*60)); { in UTC }
{ calculate bias }
Res := GetTimeZoneInformation(TZ);
If (Res = TIME_ZONE_ID_INVALID) Then RaiseLastWin32Error;
If (Res = TIME_ZONE_ID_STANDARD) Then Begin
DT := DT-((TZ.Bias+TZ.StandardBias) / (24*60));
Result := DateTimeToStr(DT)+' '+WideCharToString(TZ.StandardName);
End
Else Begin { daylight saving time }
DT := DT-((TZ.Bias+TZ.DaylightBias) / (24*60));
Result := DateTimeToStr(DT)+' '+WideCharToString(TZ.DaylightName);
End;
End;
End;

begin
Size := 5120;
GetMem(AI,Size);
Res := GetAdaptersInfo(AI,Size);
If (Res <> ERROR_SUCCESS) Then Begin
SetLastError(Res);
RaiseLastWin32Error;
End;
With Info,Lines do Begin
Work := AI;
I := 1;
Repeat
Add('');
Add('Adapter '+IntToStr(I));
Add(' ComboIndex: '+IntToStr(Work^.ComboIndex));
Add(' Adapter name: '+Work^.AdapterName);
Add(' Description: '+Work^.Description);
Add(' Adapter address: '+MACToStr(@Work^.Address,Work^.AddressLength));
Add(' Index: '+IntToStr(Work^.Index));
Add(' Type: '+IntToStr(Work^._Type));
Add(' DHCP: '+IntToStr(Work^.DHCPEnabled));
Add(' Current IP: '+GetAddrString(Work^.CurrentIPAddress));
Add(' IP addresses: '+GetAddrString(@Work^.IPAddressList));
Add(' Gateways: '+GetAddrString(@Work^.GatewayList));
Add(' DHCP servers: '+GetAddrString(@Work^.DHCPServer));
Add(' Has WINS: '+IntToStr(Integer(Work^.HaveWINS)));
Add(' Primary WINS: '+GetAddrString(@Work^.PrimaryWINSServer));
Add(' Secondary WINS: '+GetAddrString(@Work^.SecondaryWINSServer));
Add(' Lease obtained: '+TimeTToDateTimeStr(Work^.LeaseObtained));
Add(' Lease expires: '+TimeTToDateTimeStr(Work^.LeaseExpires));
Inc(I);
Work := Work^.Next;
Until (Work = nil);
End;
FreeMem(AI);
end;

procedure TIPMainForm.GetNetworkParameters;
Var
FI : PFixedInfo;
Size : Integer;
Res : Integer;
I : Integer;
DNS : PIPAddrString;

begin
Size := 1024;
GetMem(FI,Size);
Res := GetNetworkParams(FI,Size);
If (Res <> ERROR_SUCCESS) Then Begin
SetLastError(Res);
RaiseLastWin32Error;
End;
With Info do Begin
Clear;
Lines.Add('Host name: '+FI^.HostName);
Lines.Add('Domain name: '+FI^.DomainName);
aDnsList.Clear;
If (FI^.CurrentDNSServer <> nil) Then
begin
Lines.Add('Current DNS Server: '+FI^.CurrentDNSServer^.IPAddress);
end
Else Lines.Add('Current DNS Server: (none)');
I := 1;
DNS := @FI^.DNSServerList;
Repeat
Lines.Add('DNS '+IntToStr(I)+': '+DNS^.IPAddress);
aDnsList.Add(DNS^.IPAddress);
Inc(I);
DNS := DNS^.Next;
Until (DNS = nil);
Lines.Add('Scope ID: '+FI^.ScopeId);
Lines.Add('Routing: '+IntToStr(FI^.EnableRouting));
Lines.Add('Proxy: '+IntToStr(FI^.EnableProxy));
Lines.Add('DNS: '+IntToStr(FI^.EnableDNS));
End;
FreeMem(FI);
end;

procedure TIPMainForm.Button1Click(Sender: TObject);
begin
GetNetworkParameters;
GetAdapterInformation;

end;

procedure TIPMainForm.FormCreate(Sender: TObject);
begin
aDnsList:=TStringList.Create;
end;

end.

接受答案了.