在局域网中如何获取本机域名(100分)

如题，在使用windows域控制的局域网里面。

不知道这个行不行：

uses WinSock

procedure TForm1.Button1Click(Sender: TObject);
var
WSAData: TWSAData;
HostEnt: PHostEnt;
netaddr:u_long;
//sIP: string;
begin

WSAStartup(2, WSAData);
netaddr:=inet_addr(Pchar('127.0.0.1'));
HostEnt:=GetHostbyaddr(pchar(@netaddr),30,0);
caption:=strpas(HostEnt.h_name);
WSACleanup;
//result:= sIP;

end;

使用gethostbyname函数

研究一下windowsapi吧

//这个资料你参考一下了
如何知道机器所在域(Domain)以及主域控制器名字？
使用PDC函数即可。
type
NET_API_STATUS = DWORD;

var
NTNetGetDCName : function(Server, Domain: pWideChar; var DC: pWideChar):
NET_API_STATUS; StdCall;
NTNetApiBufferFree: function(lpBuffer: Pointer):
NET_API_STATUS; StdCall;

function GetPDCName: string;
const
NTlib = 'NETAPI32.DLL';
var
pDomain : PWideChar;
LibHandle : THandle;
begin
Result := '';
LibHandle := LoadLibrary(NTlib);
if LibHandle = 0 then
raise Exception.Create('Unable to map library: ' + NTlib);
try
@NTNetGetDCName := GetProcAddress(Libhandle, 'NetGetDCName');
@NTNetApiBufferFree := GetProcAddress(Libhandle, 'NetApiBufferFree');
try
if NTNetGetDCName(nil, nil, pDomain) = 0 then
Result := WideCharToString(pDomain);
finally
NTNetApiBufferFree(pDomain);
end;
finally
FreeLibrary(Libhandle);
end;
end;

procedure TForm1.Button1Click(Sender: TObject);
begin
ShowMessage(GetPDCName);
end;
*************************
下面的函数获取域名：

function GetDomainName: AnsiString;
type
WKSTA_INFO_100 = record
wki100_platform_id: Integer;
wki100_computername: PWideChar;
wki100_langroup: PWideChar;
wki100_ver_major: Integer;
wki100_ver_minor: Integer;
end;

WKSTA_USER_INFO_1 = record
wkui1_username: PChar;
wkui1_logon_domain: PChar;
wkui1_logon_server: PChar;
wkui1_oth_domains: PChar;
end;
type
//Win9X ANSI prototypes from RADMIN32.DLL and RLOCAL32.DLL

TWin95_NetUserGetInfo = function(ServerName, UserName: PChar; Level: DWORD; var
BfrPtr: Pointer): Integer;
stdcall;
TWin95_NetApiBufferFree = function(BufPtr: Pointer): Integer;
stdcall;
TWin95_NetWkstaUserGetInfo = function(Reserved: PChar; Level: Integer; var
BufPtr: Pointer): Integer;
stdcall;

//WinNT UNICODE equivalents from NETAPI32.DLL

TWinNT_NetWkstaGetInfo = function(ServerName: PWideChar; level: Integer; var
BufPtr: Pointer): Integer;
stdcall;
TWinNT_NetApiBufferFree = function(BufPtr: Pointer): Integer;
stdcall;

function IsWinNT: Boolean;
var
VersionInfo: TOSVersionInfo;
begin
VersionInfo.dwOSVersionInfoSize := SizeOf(TOSVersionInfo);
Result := GetVersionEx(VersionInfo);
if Result then
Result := VersionInfo.dwPlatformID = VER_PLATFORM_WIN32_NT;
end;
var

Win95_NetUserGetInfo: TWin95_NetUserGetInfo;
Win95_NetWkstaUserGetInfo: TWin95_NetWkstaUserGetInfo;
Win95_NetApiBufferFree: TWin95_NetApiBufferFree;

WinNT_NetWkstaGetInfo: TWinNT_NetWkstaGetInfo;
WinNT_NetApiBufferFree: TWinNT_NetApiBufferFree;

WSNT: ^WKSTA_INFO_100;
WS95: ^WKSTA_USER_INFO_1;

EC: DWORD;
hNETAPI: THandle;
begin
try

Result := '';

if IsWinNT then
begin
hNETAPI := LoadLibrary('NETAPI32.DLL');
if hNETAPI <> 0 then
begin @WinNT_NetWkstaGetInfo := GetProcAddress(hNETAPI, 'NetWkstaGetInfo');
@WinNT_NetApiBufferFree := GetProcAddress(hNETAPI, 'NetApiBufferFree');

EC := WinNT_NetWkstaGetInfo(nil, 100, Pointer(WSNT));
if EC = 0 then
begin
Result := WideCharToString(WSNT^.wki100_langroup);
WinNT_NetApiBufferFree(Pointer(WSNT));
end;
end;
end
else
begin
hNETAPI := LoadLibrary('RADMIN32.DLL');
if hNETAPI <> 0 then
begin @Win95_NetApiBufferFree := GetProcAddress(hNETAPI, 'NetApiBufferFree');
@Win95_NetUserGetInfo := GetProcAddress(hNETAPI, 'NetUserGetInfoA');

EC := Win95_NetWkstaUserGetInfo(nil, 1, Pointer(WS95));
if EC = 0 then
begin
Result := WS95^.wkui1_logon_domain;
Win95_NetApiBufferFree(Pointer(WS95));
end;
end;
end;

finally
if hNETAPI <> 0 then
FreeLibrary(hNETAPI);
end;
end;

procedure TForm1.Button1Click(Sender: TObject);
begin
ShowMessage(GetDomainName);
end;

ok,3x