'Downloaded from: www.planet-source-code.co...p;lngWId=1
'By: NeoThePenguin
'CNetworkEnum
'
'Utility class to perform network enumeration functions.
'Can locate all servers, printers and shares on a given network.
Option Explicit
Private Const RESOURCE_CONNECTED As Long = &H1&
Private Const RESOURCE_GLOBALNET As Long = &H2&
Private Const RESOURCE_REMEMBERED As Long = &H3&
Private Const RESOURCEDISPLAYTYPE_DIRECTORY& = &H9
Private Const RESOURCEDISPLAYTYPE_DOMAIN& = &H1
Private Const RESOURCEDISPLAYTYPE_FILE& = &H4
Private Const RESOURCEDISPLAYTYPE_GENERIC& = &H0
Private Const RESOURCEDISPLAYTYPE_GROUP& = &H5
Private Const RESOURCEDISPLAYTYPE_NETWORK& = &H6
Private Const RESOURCEDISPLAYTYPE_ROOT& = &H7
Private Const RESOURCEDISPLAYTYPE_SERVER& = &H2
Private Const RESOURCEDISPLAYTYPE_SHARE& = &H3
Private Const RESOURCEDISPLAYTYPE_SHAREADMIN& = &H8
Private Const RESOURCETYPE_ANY As Long = &H0&
Private Const RESOURCETYPE_DISK As Long = &H1&
Private Const RESOURCETYPE_PRINT As Long = &H2&
Private Const RESOURCETYPE_UNKNOWN As Long = &HFFFF&
Private Const RESOURCEUSAGE_ALL As Long = &H0&
Private Const RESOURCEUSAGE_CONNECTABLE As Long = &H1&
Private Const RESOURCEUSAGE_CONTAINER As Long = &H2&
Private Const RESOURCEUSAGE_RESERVED As Long = &H80000000
Private Const NO_ERROR = 0
Private Const ERROR_MORE_DATA = 234
Private Const RESOURCE_ENUM_ALL As Long = &HFFFF
Private Type NETRESOURCE
dwScope As Long
dwType As Long
dwDisplayType As Long
dwUsage As Long
pLocalName As Long
pRemoteName As Long
pComment As Long
pProvider As Long
End Type
Private Type NETRESOURCE_EXTENDED
dwScope As Long
dwType As Long
dwDisplayType As Long
dwUsage As Long
sLocalName As String
sRemoteName As String
sComment As String
sProvider As String
End Type
'WNet API resources
Private Declare Function WNetAddConnection2 Lib "mpr.dll" Alias "WNetAddConnection2A" (lpNetResource As NETRESOURCE, ByVal lpPassword As String, ByVal lpUserName As String, ByVal dwFlags As Long) As Long
Private Declare Function WNetOpenEnum Lib "mpr.dll" Alias "WNetOpenEnumA" (ByVal dwScope As Long, ByVal dwType As Long, ByVal dwUsage As Long, lpNetResource As Any, lphEnum As Long) As Long
Private Declare Function WNetEnumResource Lib "mpr.dll" Alias "WNetEnumResourceA" (ByVal hEnum As Long, lpcCount As Long, lpBuffer As NETRESOURCE, lpBufferSize As Long) As Long
Private Declare Function WNetCloseEnum Lib "mpr.dll" (ByVal hEnum As Long) As Long
Private Declare Function VarPtrAny Lib "vb40032.dll" Alias "VarPtr" (lpObject As Any) As Long
Private Declare Sub CopyMem Lib "kernel32" Alias "RtlMoveMemory" (lpTo As Any, lpFrom As Any, ByVal lLen As Long)
Private Declare Sub CopyMemByPtr Lib "kernel32" Alias "RtlMoveMemory" (ByVal lpTo As Long, ByVal lpFrom As Long, ByVal lLen As Long)
Private Declare Function lstrcpy Lib "kernel32" Alias "lstrcpyA" (ByVal lpString1 As String, ByVal lpString2 As Any) As Long
Private Declare Function lstrlen Lib "kernel32" Alias "lstrlenA" (ByVal lpString As Any) As Long
Private Declare Function GetUserName Lib "advapi32.dll" Alias "GetUserNameA" (ByVal lpBuffer As String, nSize As Long) As Long
Private Declare Function GetComputerName Lib "kernel32" Alias "GetComputerNameA" (ByVal lpBuffer As String, nSize As Long) As Long
'Filtered immediate access storage
Private sUserName As String
Private sMachineName As String
Private sServerList As String
Private sPrinterList As String
Private sShareList As String
Private sDirectoryList As String
Private sDomainList As String
Private sFileList As String
Private sGenericList As String
Private sGroupList As String
Private sNetworkList As String
Private sRootList As String
Private sShareAdminList As String
'Sets the resource types that will be enumerated (disk,printer etc)
Private lResType As Long
'Limitation
Private Const MAX_RESOURCES = 256
Private Const NOT_A_CONTAINER = -1
'Stores the results of the enumeration
Private uNetApi(0 To MAX_RESOURCES) As NETRESOURCE
Private uNet() As NETRESOURCE_EXTENDED
Private Sub Class_Initialize()
'Default setting
Call SetResourceType(RESOURCETYPE_DISK)
End Sub
'Reloads the enumerated list of network entities
Public Sub Reset()
Dim bFirstTime As Boolean
Dim lReturn As Long
Dim hEnum As Long
Dim lCount As Long
Dim lMin As Long
Dim lLength As Long
Dim l As Long
Dim lBufferSize As Long
Dim lLastIndex As Long
bFirstTime = True
Do
'Create an enumeration using the required resource type
If bFirstTime Then
lReturn = WNetOpenEnum(RESOURCE_GLOBALNET, GetResourceType, RESOURCEUSAGE_ALL, ByVal 0&, hEnum)
bFirstTime = False
Else
If uNet(lLastIndex).dwUsage And RESOURCEUSAGE_CONTAINER Then
lReturn = WNetOpenEnum(RESOURCE_GLOBALNET, GetResourceType, RESOURCEUSAGE_ALL, uNet(lLastIndex), hEnum)
Else
lReturn = NOT_A_CONTAINER
hEnum = 0
End If
lLastIndex = lLastIndex + 1
End If
'Make sure that we have a good enumeration
If lReturn = NO_ERROR Then
lCount = RESOURCE_ENUM_ALL
'Work through the enumeration until we run out
Do
lBufferSize = UBound(uNetApi) * Len(uNetApi(0)) / 2
lReturn = WNetEnumResource(hEnum, lCount, uNetApi(0), lBufferSize)
If lCount > 0 Then
ReDim Preserve uNet(0 To lMin + lCount - 1) As NETRESOURCE_EXTENDED
For l = 0 To lCount - 1
'Each Resource will appear here as uNet(i)
uNet(lMin + l).dwScope = uNetApi(l).dwScope
uNet(lMin + l).dwType = uNetApi(l).dwType
uNet(lMin + l).dwDisplayType = uNetApi(l).dwDisplayType
uNet(lMin + l).dwUsage = uNetApi(l).dwUsage
'Get the name
If uNetApi(l).pLocalName Then
lLength = lstrlen(uNetApi(l).pLocalName)
uNet(lMin + l).sLocalName = Space$(lLength)
CopyMem ByVal uNet(lMin + l).sLocalName, ByVal uNetApi(l).pLocalName, lLength
End If
'Get the remote name
If uNetApi(l).pRemoteName Then
lLength = lstrlen(uNetApi(l).pRemoteName)
uNet(lMin + l).sRemoteName = Space$(lLength)
CopyMem ByVal uNet(lMin + l).sRemoteName, ByVal uNetApi(l).pRemoteName, lLength
End If
'Get any comment associated with it
If uNetApi(l).pComment Then
lLength = lstrlen(uNetApi(l).pComment)
uNet(lMin + l).sComment = Space$(lLength)
CopyMem ByVal uNet(lMin + l).sComment, ByVal uNetApi(l).pComment, lLength
End If
'Get the provider information
If uNetApi(l).pProvider Then
lLength = lstrlen(uNetApi(l).pProvider)
uNet(lMin + l).sProvider = Space$(lLength)
CopyMem ByVal uNet(lMin + l).sProvider, ByVal uNetApi(l).pProvider, lLength
End If
Next l
End If
lMin = lMin + lCount
Loop While lReturn = ERROR_MORE_DATA
End If
'Check if we have a successfully opened Enumeration
If hEnum Then
l = WNetCloseEnum(hEnum)
End If
Loop While lLastIndex < lMin
'Decode the results
Call DecodeEnum
End Sub
Private Sub DecodeLocalInfo()
On Error Resume Next
'Create a buffer
sUserName = String(255, Chr(0))
'Get the username
Call GetUserName(sUserName, 255)
'Strip the rest of the buffer
sUserName = Left(sUserName, InStr(sUserName, Chr(0)) - 1)
'Create a buffer
sMachineName = String(255, Chr(0))
Call GetComputerName(sMachineName, 255)
'Remove the unnecessary chr(0)'s
sMachineName = Left$(sMachineName, InStr(1, sMachineName, Chr(0)) - 1)
End Sub
'Sets the resource type to be enumerated
'(restricting this greatly improves performance)
'0 RESOURCETYPE_ANY = Everything
'1 RESOURCETYPE_DISK = Machines and shares only
'2 RESOURCETYPE_PRINT = Printers only
'Default is RESOURCETYPE_DISK
Public Sub SetResourceType(lResourceType As Long)
lResType = lResourceType
End Sub
'Returns the current resource type that is being scanned for
Public Function GetResourceType() As Long
GetResourceType = lResType
End Function
'Decodes the network array into a useful set of values
Private Sub DecodeEnum()
Dim l As Long
If UBound(uNet) > 0 Then
'Get some local information
Call DecodeLocalInfo
'Parse the network enumeration
For l = 0 To UBound(uNet)
'TODO: Include comments? uNet(l).sComment
Select Case uNet(l).dwDisplayType
Case RESOURCEDISPLAYTYPE_DIRECTORY&
sDirectoryList = sDirectoryList + uNet(l).sRemoteName + "|"
Case RESOURCEDISPLAYTYPE_DOMAIN
sDomainList = sDomainList + uNet(l).sRemoteName + "|"
Case RESOURCEDISPLAYTYPE_FILE
sFileList = sFileList + uNet(l).sRemoteName + "|"
Case RESOURCEDISPLAYTYPE_GENERIC
sGenericList = sGenericList + uNet(l).sRemoteName + "|"
Case RESOURCEDISPLAYTYPE_GROUP
sGroupList = sGroupList + uNet(l).sRemoteName + "|"
Case RESOURCEDISPLAYTYPE_NETWORK&
sNetworkList = sNetworkList + uNet(l).sRemoteName + "|"
Case RESOURCEDISPLAYTYPE_ROOT&
sRootList = sRootList + uNet(l).sRemoteName + "|"
Case RESOURCEDISPLAYTYPE_SERVER
sServerList = sServerList + uNet(l).sRemoteName + "|"
Case RESOURCEDISPLAYTYPE_SHARE
sShareList = sShareList + uNet(l).sRemoteName + "|"
Case RESOURCEDISPLAYTYPE_SHAREADMIN&
sShareAdminList = sShareAdminList + uNet(l).sRemoteName + "|"
End Select
Next l
End If
End Sub
'Provides the current user name
Public Function GetLocalUserName() As String
GetLocalUserName = sUserName
End Function
'Provides the current machine name
Public Function GetLocalMachineName() As String
GetLocalMachineName = sMachineName
End Function
'Returns a | delimited list of all computers on the network
Public Function GetServerList() As String
GetServerList = sServerList
End Function
'Returns a | delimited list of all shares on the network
Public Function GetShareList() As String
GetShareList = sShareList
End Function
'Returns a | delimited list of all printers on the network
Public Function GetPrinterList() As String
GetPrinterList = sPrinterList
End Function
'Returns a | delimited list of all directories on the network
Public Function GetDirectoryList() As String
GetDirectoryList = sDirectoryList
End Function
'Returns a | delimited list of all domains on the network
Public Function GetDomainList() As String
GetDomainList = sDomainList
End Function
'Returns a | delimited list of all files on the network
Public Function GetFileList() As String
GetFileList = sFileList
End Function
'Returns a | delimited list of all generic items on the network
Public Function GetGenericList() As String
GetGenericList = sGenericList
End Function
'Returns a | delimited list of all groups on the network
Public Function GetGroupList() As String
GetGroupList = sGroupList
End Function
'Returns a | delimited list of all sub networks on the network
Public Function GetNetworkList() As String
GetNetworkList = sNetworkList
End Function
'Returns a | delimited list of all roots on the network
Public Function GetRootList() As String
GetRootList = sRootList
End Function
'Returns a | delimited list of all admin shares on the network
Public Function GetShareAdminList() As String
GetShareAdminList = sShareAdminList
End Function
To use it:
Option Explicit
Dim clsNetwork As CNetworkEnum
Private Sub Form_Load()
Dim strList As String
Dim strThisComputer As String
Dim arrList() As String
Dim iCount As Integer
Dim iIndex As Integer
'create list of computers on the network
Set clsNetwork = New CNetworkEnum
clsNetwork.SetResourceType (1) 'Machines and shares
clsNetwork.Reset
strThisComputer = clsNetwork.GetLocalMachineName
strList = clsNetwork.GetServerList
arrList = Split(strList, "|" )
ReDim arrComputerList(0)
For iCount = 0 To UBound(arrList)
If arrList(iCount) <> "" Then
arrList(iCount) = Replace(arrList(iCount), "\", "" )
If arrList(iCount) <> strThisComputer Then
If arrComputerList(0) = "" Then
iIndex = 0
Else
iIndex = UBound(arrComputerList) + 1
End If
ReDim Preserve arrComputerList(0 To iIndex)
arrComputerList(iIndex) = UCase$(arrList(iCount))
End If
End If
Next iCount
End Sub |
