Delphi 得到局域网内所有电脑的名称和IP地址

unit Unit1;

interface

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

type
TForm1 = class(TForm)
ListBox1: TListBox;
procedure FormCreate(Sender: TObject);
private
function GetServerList(List: TStringList): Boolean;
function GetUsers(const GroupName: String; List: TStringList): Boolean;
{ Private declarations }
public
{ Public declarations }
end;

var
Form1: TForm1;

implementation

{$R *.dfm}

function TForm1.GetServerList(List: TStringList): Boolean;
type
TNetResourceArray = ^TNetResource; //网络类型的数组
var
NetResource: TNetResource;
Buf: Pointer;
Count, BufSize, Res: DWORD;
lphEnum: THandle;
p: TNetResourceArray;
i, j: SmallInt;
NetworkTypeList: TList;
begin
Result := False;
NetworkTypeList := TList.Create;
List.Clear;
//获取整个网络中的文件资源的句柄，lphEnum为返回名柄
Res := WNetOpenEnum(RESOURCE_GLOBALNET, RESOURCETYPE_DISK,
RESOURCEUSAGE_CONTAINER, nil, lphEnum);
if Res <> NO_ERROR then Exit; //Raise Exception(Res);//执行失败
//获取整个网络中的网络类型信息
Count := $FFFFFFFF; //不限资源数目
BufSize := 8192; //缓冲区大小设置为8K
GetMem(Buf, BufSize); //申请内存，用于获取工作组信息
Res := WNetEnumResource(lphEnum, Count, Pointer(Buf), BufSize);
if (Res = ERROR_NO_MORE_ITEMS) //资源列举完毕
or (Res <> NO_ERROR) //执行失败
then Exit;
P := TNetResourceArray(Buf);
for I := 0 to Count - 1 do begin//记录各个网络类型的信息
NetworkTypeList.Add(p);
Inc(P);
end;
//WNetCloseEnum关闭一个列举句柄
Res := WNetCloseEnum(lphEnum); //关闭一次列举
if Res <> NO_ERROR then exit;
for J := 0 to NetworkTypeList.Count - 1 do begin//列出各个网络类型中的所有工作组名称
//列出一个网络类型中的所有工作组名称
NetResource := TNetResource(NetworkTypeList.Items[J]^); //网络类型信息
//获取某个网络类型的文件资源的句柄，NetResource为网络类型信息，lphEnum为返回名柄
Res := WNetOpenEnum(RESOURCE_GLOBALNET, RESOURCETYPE_DISK,
RESOURCEUSAGE_CONTAINER, @NetResource, lphEnum);
if Res <> NO_ERROR then break; //执行失败
while true do begin//列举一个网络类型的所有工作组的信息
Count := $FFFFFFFF; //不限资源数目
BufSize := 8192; //缓冲区大小设置为8K
GetMem(Buf, BufSize); //申请内存，用于获取工作组信息
//获取一个网络类型的文件资源信息，
Res := WNetEnumResource(lphEnum, Count, Pointer(Buf), BufSize);
if (Res = ERROR_NO_MORE_ITEMS) //资源列举完毕
or (Res <> NO_ERROR) //执行失败
then Break;
P := TNetResourceArray(Buf);
for I := 0 to Count - 1 do begin//列举各个工作组的信息
List.Add(StrPAS(P^.lpRemoteName)); //取得一个工作组的名

称
Inc(P);
end;
end;
Res := WNetCloseEnum(lphEnum); //关闭一次列举
if Res <> NO_ERROR then break; //执行失败
end;
Result := True;
FreeMem(Buf);
NetworkTypeList.Destroy;
end;


function TForm1.GetUsers(const GroupName: String; List: TStringList): Boolean;
type
TNetResourceArray = ^TNetResource; //网络类型的数组
var
NetResource: TNetResource;
Buf: Pointer;
Count, BufSize, Res: DWord;
Ind: Integer;
lphEnum: THandle;
Temp: TNetResourceArray;
begin
Result := False;
List.Clear;
FillChar(NetResource, SizeOf(NetResource), 0); //初始化网络层次信息
NetResource.lpRemoteName := @GroupName[1]; //指定工作组名称
NetResource.dwDisplayType := RESOURCEDISPLAYTYPE_SERVER; //类型为服务器（工作组）
NetResource.dwUsage := RESOURCEUSAGE_CONTAINER;
NetResource.dwScope := RESOURCETYPE_DISK; //列举文件资源信息
//获取指定工作组的网络资源句柄
Res := WNetOpenEnum(RESOURCE_GLOBALNET, RESOURCETYPE_DISK,
RESOURCEUSAGE_CONTAINER, @NetResource, lphEnum);
if Res <> NO_ERROR then Exit; //执行失败
while True do begin//列举指定工作组的网络资源
Count := $FFFFFFFF; //不限资源数目
BufSize := 8192; //缓冲区大小设置为8K
GetMem(Buf, BufSize); //申请内存，用于获取工作组信息
//获取计算机名称
Res := WNetEnumResource(lphEnum, Count, Pointer(Buf), BufSize);
if Res = ERROR_NO_MORE_ITEMS then break; //资源列举完毕
if (Res <> NO_ERROR) then Exit; //执行失败
Temp := TNetResourceArray(Buf);
for Ind := 0 to Count - 1 do begin//列举工作组的计算机名称
//获取工作组的计算机名称，+2表示删除"\\"，如\\wangfajun=>wangfajun
List.Add(Temp^.lpRemoteName + 2);
Inc(Temp);
end;
FreeMem(Buf);
end;
Res := WNetCloseEnum(lphEnum); //关闭一次列举
if Res <> NO_ERROR then exit; //执行失败
Result := True;
end;


procedure TForm1.FormCreate(Sender: TObject);
var
WSAData: TWSAData;
HostEnt: PHostEnt;
sIP: String;
i, j: Integer;
list1, list2: TStringList;
begin
WSAStartup(2, WSAData);
list1 := TStringList.Create;
list2 := TStringList.Create;
if GetServerList(list1) then begin
for i := 0 to list1.Count - 1 do begin
if not GetUsers(list1.Strings[i], list2) then Continue;
for j := 0 to list2.Count - 1 do begin
HostEnt := gethostbyname(PChar(list2.Strings[j]));
if HostEnt <> nil then begin
with HostEnt^ do
sIP := Format('%d.%d.%d.%d', [Byte(h_addr^[0]), Byte(h_addr^[1]), Byte(h_addr^[2]), Byte(h_addr^[3])]);
end;
ListBox1.Items.Add(list2.Strings[j]+','+sIP);
end;
end;
end;
list1.Free;
list2.Free;
WSACleanup;
end;


end.