Option Compare Database
Option Explicit
'This code will only work on NT3.1 and up and XP...not 9x or ME
''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''
' Copyright  ©1996  -2004  VBnet, Randy Birch, All Rights Reserved.
' Some pages may also contain other copyrights by the author.
''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''
' Distribution: You can freely use this code in your own
'               applications, but you may not reproduce
'               or publish this code on any web site,
'               online service, or distribute as source
'               on any media without express permission.
''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''
'Windows type used to call the Net API
Public Const MAX_PREFERRED_LENGTH As Long = -1
Public Const NERR_SUCCESS As Long = 0&
Public Const ERROR_MORE_DATA As Long = 234&

Private Const SV_TYPE_WORKSTATION         As Long = &H1 'LAN Manager workstations
Private Const SV_TYPE_SERVER              As Long = &H2 'LAN Manager servers
Private Const SV_TYPE_SQLSERVER           As Long = &H4
Private Const SV_TYPE_DOMAIN_CTRL         As Long = &H8
Private Const SV_TYPE_DOMAIN_BAKCTRL      As Long = &H10
Private Const SV_TYPE_TIME_SOURCE         As Long = &H20
Private Const SV_TYPE_AFP                 As Long = &H40
Private Const SV_TYPE_NOVELL              As Long = &H80
Private Const SV_TYPE_DOMAIN_MEMBER       As Long = &H100
Private Const SV_TYPE_PRINTQ_SERVER       As Long = &H200
Private Const SV_TYPE_DIALIN_SERVER       As Long = &H400
Private Const SV_TYPE_XENIX_SERVER        As Long = &H800
Private Const SV_TYPE_SERVER_UNIX         As Long = SV_TYPE_XENIX_SERVER 'Servers running Unix
Private Const SV_TYPE_NT                  As Long = &H1000 'NT/2000 workstations or servers
Private Const SV_TYPE_WFW                 As Long = &H2000 'Servers running Windows for Workgroups
Private Const SV_TYPE_SERVER_MFPN         As Long = &H4000
Private Const SV_TYPE_SERVER_NT           As Long = &H8000 'NT/2000 servers not domain controller
Private Const SV_TYPE_POTENTIAL_BROWSER   As Long = &H10000
Private Const SV_TYPE_BACKUP_BROWSER      As Long = &H20000
Private Const SV_TYPE_MASTER_BROWSER      As Long = &H40000
Private Const SV_TYPE_DOMAIN_MASTER       As Long = &H80000
Private Const SV_TYPE_SERVER_OSF          As Long = &H100000
Private Const SV_TYPE_SERVER_VMS          As Long = &H200000
Private Const SV_TYPE_WINDOWS             As Long = &H400000  'Windows  95  or later
Private Const SV_TYPE_DFS                 As Long = &H800000  'Root of a DFS tree
Private Const SV_TYPE_CLUSTER_NT          As Long = &H1000000 'NT Cluster
Private Const SV_TYPE_TERMINALSERVER      As Long = &H2000000 'Terminal Server
Private Const SV_TYPE_DCE                 As Long = &H10000000 'IBM DSS
Private Const SV_TYPE_ALTERNATE_XPORT     As Long = &H20000000 'return alternate transport
Private Const SV_TYPE_LOCAL_LIST_ONLY     As Long = &H40000000 'return local only (Servers maintained by the browser)
Private Const SV_TYPE_DOMAIN_ENUM         As Long = &H80000000 'Primary Domain (ignore version info)
Private Const SV_TYPE_ALL                 As Long = &HFFFFFFFF 'All servers

Private Const SV_PLATFORM_ID_OS2 As Long =  400 
Private Const SV_PLATFORM_ID_NT  As Long =  500 

Private Const PLATFORM_ID_DOS    As Long =  300 
Private Const PLATFORM_ID_OS2    As Long =  400 
Private Const PLATFORM_ID_NT     As Long =  500 
Private Const PLATFORM_ID_OSF    As Long =  600 
Private Const PLATFORM_ID_VMS    As Long =  700 

'Mask applied to svX_version_major in order to obtain the major version number
Public Const MAJOR_VERSION_MASK As Long = &HF

Public Type SERVER_INFO_101
  sv101_platform_id  As Long
  sv101_name As Long
  sv101_version_major As Long
  sv101_version_minor As Long
  sv101_type As Long
  sv101_comment As Long
End Type

Public Declare Function NetServerEnum Lib "netapi32" (ByVal servername As Long, ByVal level As Long, _
buf As Any, ByVal prefmaxlen As Long, entriesread As Long, totalentries As Long, ByVal servertype As Long, ByVal domain As Long, resume_handle As Long) As Long

Public Declare Function NetApiBufferFree Lib "netapi32" (ByVal Buffer As Long) As Long
Public Declare Sub CopyMemory Lib "kernel32" Alias "RtlMoveMemory" (pTo As Any, uFrom As Any, ByVal lSize As Long)
Private Declare Function lstrlenW Lib "kernel32" (ByVal lpString As Long) As Long

Public Ap() As String 'Массив имен компьютеров в сети и ОС на них


Function GetServers(sDomain As String) As Long
    'Lists all servers of the specified type that are visible in a domain.
    Dim bufptr          As Long
    Dim dwEntriesread   As Long
    Dim dwTotalentries  As Long
    Dim dwResumehandle  As Long
    Dim dwServertype    As Long
    Dim se101           As SERVER_INFO_101
    Dim success         As Long
    Dim nStructSize     As Long
    Dim cnt             As Long

    nStructSize = LenB(se101)
    dwServertype = SV_TYPE_ALL
   
    'Call passing MAX_PREFERRED_LENGTH to have the API allocate required memory for the return values.

    'The call is enumerating all machines on the network (SV_TYPE_ALL); however, by Or'ing specific bit masks for defined
    'types you can customize the returned data. For example, a value of 0x00000003 combines the bit masks for
    'SV_TYPE_WORKSTATION (0x00000001) and SV_TYPE_SERVER (0x00000002).
  
    'dwServerName must be Null. The level parameter (101 here) specifies the data structure being
    'used (in this case a SERVER_INFO_101 structure).

    'The domain member is passed as Null, indicating machines on the primary domain are to be retrieved.
    'If you decide to use this member, pass StrPtr( "domain name" ), not the string itself.
    success = NetServerEnum (0 &,  101 , bufptr, MAX_PREFERRED_LENGTH, dwEntriesread, dwTotalentries, dwServertype,  0 &, dwResumehandle)
    If success = NERR_SUCCESS And success <> ERROR_MORE_DATA Then 'if all goes well
        ReDim Ap(dwEntriesread - 1, 2)
        For cnt = 0 To dwEntriesread - 1 'loop through the returned data, adding each machine to the list
            'get one chunk of data and cast into an SERVER_INFO_101 struct in order to add the name to a list
            CopyMemory se101, ByVal bufptr + (nStructSize * cnt), nStructSize
            Ap(cnt, 0) = GetPointerToByteStringW(se101.sv101_name)
            If GetPlatformString(se101.sv101_platform_id) = "Win NT" Then
                Select Case (se101.sv101_version_major And MAJOR_VERSION_MASK) & "." & se101.sv101_version_minor
                Case "4.0"
                    Ap(cnt, 1) = "Win NT"
                Case "5.0"
                    Ap(cnt, 1) = "Win 2000"
                Case "5.1"
                    Ap(cnt, 1) = "Win XP"
                Case Else
                    Ap(cnt, 1) = "Win NT ?"
                End Select
            Else
                Ap(cnt, 1) = GetPlatformString(se101.sv101_platform_id) & " " & (se101.sv101_version_major And MAJOR_VERSION_MASK) & "." & se101.sv101_version_minor
            End If
            Ap(cnt, 2) = Nz(se101.sv101_type, vbNullString)
        Next
    End If
    'Clean up, regardless of success
    Call NetApiBufferFree(bufptr)
    GetServers = dwEntriesread
End Function

Private Function GetPlatformString(ByVal dwPlatformID As Long) As String
   Select Case dwPlatformID
      Case PLATFORM_ID_DOS: GetPlatformString =  "DOS" 
      Case PLATFORM_ID_OS2: GetPlatformString =  "Win" 
      Case PLATFORM_ID_NT:  GetPlatformString =  "Win NT" 
      Case PLATFORM_ID_OSF: GetPlatformString =  "OSF" 
      Case PLATFORM_ID_VMS: GetPlatformString =  "VMS" 
   End Select
End Function

Public Function GetPointerToByteStringW(ByVal dwData As Long) As String
   Dim tmp() As Byte
   Dim tmplen As Long
   If dwData <>  0  Then
      tmplen = lstrlenW(dwData) *  2 
      If tmplen <>  0  Then
         ReDim tmp (0  To (tmplen -  1 )) As Byte
         CopyMemory tmp (0 ), ByVal dwData, tmplen
         GetPointerToByteStringW = tmp
     End If
   End If
End Function