Ищем все компьютеры в сети

Источник: p-lib

Ковязин Дмитрий

Ниже представлена функция FindComputers, которая заполняет StringList именами компьютеров:

unit FindComp; 

interface 

uses 
  Windows, Classes; 

function FindComputers: DWORD; 

var 
  Computers: TStringList; 

implementation 

uses 
  SysUtils; 

const 
  MaxEntries = 250; 

function FindComputers: DWORD; 

var 
  EnumWorkGroupHandle, EnumComputerHandle: THandle; 
  EnumError: DWORD; 
  Network: TNetResource; 
  WorkGroupEntries, ComputerEntries: DWORD; 
  EnumWorkGroupBuffer, EnumComputerBuffer: array[1..MaxEntries] of TNetResource; 
  EnumBufferLength: DWORD; 
  I, J: DWORD; 

begin 

  Computers.Clear; 

  FillChar(Network, SizeOf(Network), 0); 
  with Network do 
  begin 
    dwScope := RESOURCE_GLOBALNET; 
    dwType := RESOURCETYPE_ANY; 
    dwUsage := RESOURCEUSAGE_CONTAINER; 
  end; 
   
  EnumError := WNetOpenEnum(RESOURCE_GLOBALNET, RESOURCETYPE_ANY, 0, _
                                    @Network, EnumWorkGroupHandle); 

  if EnumError = NO_ERROR then 
  begin 
    WorkGroupEntries := MaxEntries; 
    EnumBufferLength := SizeOf(EnumWorkGroupBuffer); 
    EnumError := WNetEnumResource(EnumWorkGroupHandle, WorkGroupEntries, _
                           @EnumWorkGroupBuffer, EnumBufferLength); 

    if EnumError = NO_ERROR then 
    begin 
      for I := 1 to WorkGroupEntries do 
      begin 
        EnumError := WNetOpenEnum(RESOURCE_GLOBALNET, RESOURCETYPE_ANY, 0, _
                           @EnumWorkGroupBuffer[I], EnumComputerHandle); 
        if EnumError = NO_ERROR then 
        begin 
          ComputerEntries := MaxEntries; 
          EnumBufferLength := SizeOf(EnumComputerBuffer); 
          EnumError := WNetEnumResource(EnumComputerHandle, ComputerEntries, _
                                    @EnumComputerBuffer, EnumBufferLength); 
          if EnumError = NO_ERROR then 
            for J := 1 to ComputerEntries do 
              Computers.Add(Copy(EnumComputerBuffer[J].lpRemoteName, 3, _
                          Length(EnumComputerBuffer[J].lpRemoteName) - 2)); 
          WNetCloseEnum(EnumComputerHandle); 
        end; 
      end; 
    end; 
    WNetCloseEnum(EnumWorkGroupHandle); 
  end; 

  if EnumError = ERROR_NO_MORE_ITEMS then 
    EnumError := NO_ERROR; 
  Result := EnumError; 

end; 

initialization 

  Computers := TStringList.Create; 

finalization 

  Computers.Free; 

end.

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