NT Authentication within VB app

[Amy]

Can anyone tell me the API call to use to find the domain and username of
the currently logged on user to use to authenticate wen allowing access to
a VB app? The person before me tried to use LookupAccountName but it doesn't
seem to be working, it's returning the machine name instead of the domain.
Any ideas?

[Ajith]

Amy;
You should be able to do this using NetLocalGroupGetMembers. I currently
have posted a question reg this to the group as I had some problem converting
Pointer to String, otherwise the complete code that I am using is listed.
Ajith

"Amy" <agstephens@hotmail.com> wrote:
>
>Can anyone tell me the API call to use to find the domain and username of
>the currently logged on user to use to authenticate wen allowing access
to
>a VB app? The person before me tried to use LookupAccountName but it doesn't
>seem to be working, it's returning the machine name instead of the domain.
>Any ideas?

[Ajith]

Amy;
You should be able to do this using NetLocalGroupGetMembers. I currently
have posted a question reg this to the group as I had some problem converting
Pointer to String, otherwise the complete code that I am using is listed.
Ajith

"Amy" <agstephens@hotmail.com> wrote:
>
>Can anyone tell me the API call to use to find the domain and username of
>the currently logged on user to use to authenticate wen allowing access
to
>a VB app? The person before me tried to use LookupAccountName but it doesn't
>seem to be working, it's returning the machine name instead of the domain.
>Any ideas?

[Amy]

I don't think this is exactly what I'm looking for. I want to pull the domain
and username of the current user and use that to authenticate whether or
not they have rights to an Oracle database. If they do, the application
opens, if they don't the application errors out.

The way I understand NetLocalGroupGetMembers, it appears to return all group
members within a given domain\local group right?

"Ajith" <siponjava@hotmail.com> wrote:
>
>Amy;
>You should be able to do this using NetLocalGroupGetMembers. I currently
>have posted a question reg this to the group as I had some problem converting
>Pointer to String, otherwise the complete code that I am using is listed.
>Ajith
>
>"Amy" <agstephens@hotmail.com> wrote:
>>
>>Can anyone tell me the API call to use to find the domain and username
of
>>the currently logged on user to use to authenticate wen allowing access
>to
>>a VB app? The person before me tried to use LookupAccountName but it doesn't
>>seem to be working, it's returning the machine name instead of the domain.
>>Any ideas?
>

[Amy]

I don't think this is exactly what I'm looking for. I want to pull the domain
and username of the current user and use that to authenticate whether or
not they have rights to an Oracle database. If they do, the application
opens, if they don't the application errors out.

The way I understand NetLocalGroupGetMembers, it appears to return all group
members within a given domain\local group right?

"Ajith" <siponjava@hotmail.com> wrote:
>
>Amy;
>You should be able to do this using NetLocalGroupGetMembers. I currently
>have posted a question reg this to the group as I had some problem converting
>Pointer to String, otherwise the complete code that I am using is listed.
>Ajith
>
>"Amy" <agstephens@hotmail.com> wrote:
>>
>>Can anyone tell me the API call to use to find the domain and username
of
>>the currently logged on user to use to authenticate wen allowing access
>to
>>a VB app? The person before me tried to use LookupAccountName but it doesn't
>>seem to be working, it's returning the machine name instead of the domain.
>>Any ideas?
>

[Gman]

I believe this code should solve your problem. The GetUserName API call will
return the user's name.

Public Declare Function GetUserName Lib "advapi32.dll" Alias "GetUserNameA"
(ByVal lpBuffer As String, nSize As Long) As Long

Public Function GetUser() As String
Dim sUserName As String, lSize As Long, lLength As Long
sUserName = String(15, " ")
lSize = Len(sUserName)
lLength = GetUserName(sUserName, lSize)
GetUser = Left(sUserName, lSize - 1)
MsgBox GetUser
End Function

Gman

"Amy" <agstephens@hotmail.com> wrote:
>
>I don't think this is exactly what I'm looking for. I want to pull the domain
>and username of the current user and use that to authenticate whether or
>not they have rights to an Oracle database. If they do, the application
>opens, if they don't the application errors out.
>
>The way I understand NetLocalGroupGetMembers, it appears to return all group
>members within a given domain\local group right?
>
>"Ajith" <siponjava@hotmail.com> wrote:
>>
>>Amy;
>>You should be able to do this using NetLocalGroupGetMembers. I currently
>>have posted a question reg this to the group as I had some problem converting
>>Pointer to String, otherwise the complete code that I am using is listed.
>>Ajith
>>
>>"Amy" <agstephens@hotmail.com> wrote:
>>>
>>>Can anyone tell me the API call to use to find the domain and username
>of
>>>the currently logged on user to use to authenticate wen allowing access
>>to
>>>a VB app? The person before me tried to use LookupAccountName but it doesn't
>>>seem to be working, it's returning the machine name instead of the domain.
>>>Any ideas?
>>
>

[Gman]

I believe this code should solve your problem. The GetUserName API call will
return the user's name.

Public Declare Function GetUserName Lib "advapi32.dll" Alias "GetUserNameA"
(ByVal lpBuffer As String, nSize As Long) As Long

Public Function GetUser() As String
Dim sUserName As String, lSize As Long, lLength As Long
sUserName = String(15, " ")
lSize = Len(sUserName)
lLength = GetUserName(sUserName, lSize)
GetUser = Left(sUserName, lSize - 1)
MsgBox GetUser
End Function

Gman

"Amy" <agstephens@hotmail.com> wrote:
>
>I don't think this is exactly what I'm looking for. I want to pull the domain
>and username of the current user and use that to authenticate whether or
>not they have rights to an Oracle database. If they do, the application
>opens, if they don't the application errors out.
>
>The way I understand NetLocalGroupGetMembers, it appears to return all group
>members within a given domain\local group right?
>
>"Ajith" <siponjava@hotmail.com> wrote:
>>
>>Amy;
>>You should be able to do this using NetLocalGroupGetMembers. I currently
>>have posted a question reg this to the group as I had some problem converting
>>Pointer to String, otherwise the complete code that I am using is listed.
>>Ajith
>>
>>"Amy" <agstephens@hotmail.com> wrote:
>>>
>>>Can anyone tell me the API call to use to find the domain and username
>of
>>>the currently logged on user to use to authenticate wen allowing access
>>to
>>>a VB app? The person before me tried to use LookupAccountName but it doesn't
>>>seem to be working, it's returning the machine name instead of the domain.
>>>Any ideas?
>>
>

[sunil j]

hai amy
i am pasting the code here as a class module named ..... to use in ur VB
project.
copy all the data in between the 2 starred lines into a notepad and save
it as CNTUserWKstn.cls file to be used in ur VB project. go thru this class
file in a object browser. u will find properties like domain, loggedOnuser
etc

regards
sunilj
<jsunilkumar@hotmail.com>
*****************************************************************
VERSION 1.0 CLASS
BEGIN
MultiUse = -1 'True
Persistable = 0 'NotPersistable
DataBindingBehavior = 0 'vbNone
DataSourceBehavior = 0 'vbNone
MTSTransactionMode = 0 'NotAnMTSObject
END
Attribute VB_Name = "CNTUserWKstn"
Attribute VB_GlobalNameSpace = False
Attribute VB_Creatable = True
Attribute VB_PredeclaredId = False
Attribute VB_Exposed = False
' *********************************************************
' Copyright (C)2000 for modifying , J. Sunil Kumar Email <jsunilkumar@hotmail.com>
' with than and regards to microsoft team
' *********************************************************
Option Explicit
'
' Win32 APIs to determine OS information.
'
Private Declare Function GetVersionEx Lib "kernel32" Alias "GetVersionExA"
(lpVersionInformation As OSVERSIONINFO) As Long
Private Type OSVERSIONINFO
dwOSVersionInfoSize As Long
dwMajorVersion As Long
dwMinorVersion As Long
dwBuildNumber As Long
dwPlatformId As Long
szCSDVersion As String * 128
End Type
Private Const VER_PLATFORM_WIN32s = 0
Private Const VER_PLATFORM_WIN32_WINDOWS = 1
Private Const VER_PLATFORM_WIN32_NT = 2
'
' Win32 NetAPIs.
'
Private Declare Function NetWkstaGetInfo Lib "Netapi32.dll" (lpServer As
Any, ByVal Level As Long, lpBuffer As Any) As Long
Private Declare Function NetWkstaUserGetInfo Lib "Netapi32.dll" (ByVal reserved
As Any, ByVal Level As Long, lpBuffer As Any) As Long
Private Declare Function NetApiBufferFree Lib "Netapi32.dll" (ByVal lpBuffer
As Long) As Long
Private Declare Function NetLocalGroupGetMembers Lib "netapi32" (lpServer
As Any, lpLocalGroup As Any, ByVal Level As Long, lpBuffer As Long, ByVal
MaxLen As Long, lpEntriesRead As Long, lpTotalEntries As Long, vResume As
Any) As Long

'
' Data handling APIs
'
Private Declare Sub CopyMem 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
Private Declare Function lstrcpyW Lib "kernel32" (lpString1 As Byte, ByVal
lpString2 As Long) As Long

Private Type WKSTA_INFO_102
wki102_platform_id As Long
wki102_computername As Long
wki102_langroup As Long
wki102_ver_major As Long
wki102_ver_minor As Long
wki102_lanroot As Long
wki102_logged_on_users As Long
End Type

Private Type WkstaInfo102
PlatformId As Long
ComputerName As String
LanGroup As String
VerMajor As Long
VerMinor As Long
LanRoot As String
LoggedOnUsers As Long
End Type

Private Type WKSTA_USER_INFO_1
wkui1_username As Long
wkui1_logon_domain As Long
wkui1_oth_domains As Long
wkui1_logon_server As Long
End Type

Private Type WkstaUserInfo1
UserName As String
LogonDomain As String
OtherDomains As String
LogonServer As String
End Type

Private Type GroupMemberInfo
UserName As String
Attribute As Long
End Type

Private Type ListOfMemberGroup
Init As Boolean
LastErr As Long
List() As GroupMemberInfo
End Type

Private Type LOCALGROUP_MEMBERS_INFO_API
Sid As Long
Attribute As Long
UserName As Long
End Type

Private Const NERR_Success As Long = 0&
Private Const NERR_MoreData = 234&

'
' Member variables
'
Private m_Wks As WkstaInfo102
Private m_User As WkstaUserInfo1
Private m_IsWinNT As Boolean

' *********************************************************
' Initialization
' *********************************************************
Private Sub Class_Initialize()
Dim os As OSVERSIONINFO
'
' Check to make sure we're running NT!
'
os.dwOSVersionInfoSize = Len(os)
Call GetVersionEx(os)
If os.dwPlatformId = VER_PLATFORM_WIN32_NT Then
m_IsWinNT = True
Me.Refresh
End If
End Sub

' *********************************************************
' Public Properties (Workstation)
' *********************************************************
Public Property Get ComputerName() As String
ComputerName = m_Wks.ComputerName
End Property

Public Property Get Domain() As String
Domain = m_Wks.LanGroup
End Property

Public Property Get LanRoot() As String
LanRoot = m_Wks.LanRoot
End Property

Public Property Get LoggedOnUsers() As Long
LoggedOnUsers = m_Wks.LoggedOnUsers
End Property

Public Property Get PlatformId() As Long
PlatformId = m_Wks.PlatformId
End Property

Public Property Get VerMajor() As Long
VerMajor = m_Wks.VerMajor
End Property

Public Property Get VerMinor() As Long
VerMinor = m_Wks.VerMinor
End Property

' *********************************************************
' Public Properties (Workstation User)
' *********************************************************
Public Property Get LogonDomain() As String
LogonDomain = m_User.LogonDomain
End Property

Public Property Get LogonServer() As String
LogonServer = m_User.LogonServer
End Property

Public Property Get OtherDomains() As String
OtherDomains = m_User.OtherDomains
End Property

Public Property Get UserName() As String
UserName = m_User.UserName
End Property

' *********************************************************
' Public Methods
' *********************************************************
Public Sub Refresh()
Dim lpBuffer As Long
Dim nRet As Long
Dim wki As WKSTA_INFO_102
Dim wkui As WKSTA_USER_INFO_1
'
' These functions only exist in Windows NT!!!
'
If Not m_IsWinNT Then Exit Sub
'
' Obtain workstation information
'
nRet = NetWkstaGetInfo(ByVal 0&, 102&, lpBuffer)
If nRet = NERR_Success Then
'
' Transfer data to VB-friendly structure
'
CopyMem wki, ByVal lpBuffer, Len(wki)
m_Wks.PlatformId = wki.wki102_platform_id
m_Wks.ComputerName = PointerToStringW(wki.wki102_computername)
m_Wks.LanGroup = PointerToStringW(wki.wki102_langroup)
m_Wks.VerMajor = wki.wki102_ver_major
m_Wks.VerMinor = wki.wki102_ver_minor
m_Wks.LanRoot = PointerToStringW(wki.wki102_lanroot)
m_Wks.LoggedOnUsers = wki.wki102_logged_on_users
'
' Clean up
'
If lpBuffer Then
Call NetApiBufferFree(lpBuffer)
End If
End If
'
' Obtain user information for this workstation
'
nRet = NetWkstaUserGetInfo(0&, 1&, lpBuffer)
If nRet = NERR_Success Then
'
' Transfer data to VB-friendly structure
'
CopyMem wkui, ByVal lpBuffer, Len(wkui)
m_User.UserName = PointerToStringW(wkui.wkui1_username)
m_User.LogonDomain = PointerToStringW(wkui.wkui1_logon_domain)
m_User.OtherDomains = PointerToStringW(wkui.wkui1_oth_domains)
m_User.LogonServer = PointerToStringW(wkui.wkui1_logon_server)
'
' Clean up
'
If lpBuffer Then
Call NetApiBufferFree(lpBuffer)
End If
End If
End Sub

' *********************************************************
' Private Methods
' *********************************************************
Private Function PointerToStringW(lpStringW As Long) As String
Dim buffer() As Byte
Dim nLen As Long

If lpStringW Then
nLen = lstrlenW(lpStringW) * 2
If nLen Then
ReDim buffer(0 To (nLen - 1)) As Byte
CopyMem buffer(0), ByVal lpStringW, nLen
PointerToStringW = buffer
End If
End If
End Function

'Ritorna un elenco dei membri di un gruppo locale
'Uses the win api functions to retrieve list of local groups a user belongs
Private Function LocalGroupsGetMember(Server As String, Group As String)
As ListOfMemberGroup
Dim yServer() As Byte
Dim yGroup() As Byte
Dim lRetCode As Long
Dim nRead As Long, nTotal As Long
Dim nRet As Long, nResume As Long
Dim PrefMaxLen As Long
Dim i As Long, x As Long
Dim tGroupInfo As LOCALGROUP_MEMBERS_INFO_API
Dim lGroupInfo As Long
Dim lGroupInfoPtr As Long
Dim GroupInfo As GroupMemberInfo
Dim GrpList As ListOfMemberGroup

yServer = MakeServerName(ByVal Server)
yGroup = Group & vbNullChar
PrefMaxLen = 65536

nRet = NERR_MoreData
Do While (nRet = NERR_MoreData)

nRet = NetLocalGroupGetMembers(yServer(0), yGroup(0), 1, lGroupInfo,
PrefMaxLen, nRead, nTotal, nResume)

If (nRet <> NERR_Success And _
nRet <> NERR_MoreData) Then
GrpList.Init = False
GrpList.LastErr = nRet
Exit Do
End If

lGroupInfoPtr = lGroupInfo

x = 1
Do While x <= nRead

CopyMem tGroupInfo, ByVal lGroupInfoPtr, Len(tGroupInfo)

GroupInfo.UserName = PointerToStringW(tGroupInfo.UserName)
'If GroupInfo.UserName = "sunil" Then MsgBox GroupInfo.UserName
GroupInfo.Attribute = tGroupInfo.Attribute
i = i + 1
ReDim Preserve GrpList.List(1 To i) As GroupMemberInfo
GrpList.List(i) = GroupInfo
x = x + 1

lGroupInfoPtr = lGroupInfoPtr + Len(tGroupInfo)

Loop

lRetCode = NetApiBufferFree(lGroupInfo)
GrpList.Init = (x > 1)

Loop

LocalGroupsGetMember = GrpList

End Function

'Used by the private function LocalGroupsGetMember
Private Function MakeServerName(ByVal ServerName As String)
Dim yServer() As Byte

If ServerName <> "" Then
If InStr(1, ServerName, "\\") = 0 Then
ServerName = "\\" & ServerName
End If
End If

yServer = ServerName & vbNullChar
MakeServerName = yServer

End Function


' *********************************************************
' Public Methods
' Pass the name of group as input string
' returns True if current user is in the group specified as in parameter
' else returns False
' *********************************************************

Public Function CheckCurrentUserInGroup(GrpItem As String) As Boolean

Dim GrpList As ListOfMemberGroup
Dim i As Integer

'Local Group
GrpList = LocalGroupsGetMember(ComputerName, GrpItem)

'if the grplist is not initilised ie., no corresponding entries then exit
If GrpList.Init = False Then

CheckCurrentUserInGroup = False

Else

For i = 1 To UBound(GrpList.List)
'if user and group match then return true and exit
If UserName = GrpList.List(i).UserName Then
CheckCurrentUserInGroup = True
Exit Function
Else
CheckCurrentUserInGroup = False
End If
Next

End If

End Function

' *********************************************************
' Public Methods
' returns a string array of groups to which the user belongs
' *********************************************************

Public Function UsersInGroup(ByVal GrpName As String) As String()
Dim GrpList As ListOfMemberGroup
Dim i As Integer, aUser() As String

'Local Group
GrpList = LocalGroupsGetMember(ComputerName, GrpName)

'if the grplist is not initilised ie., no corresponding entries.
If GrpList.Init = False Then
UsersInGroup = aUser()
Else
ReDim aUser(1 To UBound(GrpList.List))
For i = 1 To UBound(GrpList.List)
aUser(i) = GrpList.List(i).UserName
Next
UsersInGroup = aUser()
End If

End Function


*****************************************************************


"Amy" <agstephens@hotmail.com> wrote:
>
>Can anyone tell me the API call to use to find the domain and username of
>the currently logged on user to use to authenticate wen allowing access
to
>a VB app? The person before me tried to use LookupAccountName but it doesn't
>seem to be working, it's returning the machine name instead of the domain.
>Any ideas?

[sunil j]

hai amy
i am pasting the code here as a class module named ..... to use in ur VB
project.
copy all the data in between the 2 starred lines into a notepad and save
it as CNTUserWKstn.cls file to be used in ur VB project. go thru this class
file in a object browser. u will find properties like domain, loggedOnuser
etc

regards
sunilj
<jsunilkumar@hotmail.com>
*****************************************************************
VERSION 1.0 CLASS
BEGIN
MultiUse = -1 'True
Persistable = 0 'NotPersistable
DataBindingBehavior = 0 'vbNone
DataSourceBehavior = 0 'vbNone
MTSTransactionMode = 0 'NotAnMTSObject
END
Attribute VB_Name = "CNTUserWKstn"
Attribute VB_GlobalNameSpace = False
Attribute VB_Creatable = True
Attribute VB_PredeclaredId = False
Attribute VB_Exposed = False
' *********************************************************
' Copyright (C)2000 for modifying , J. Sunil Kumar Email <jsunilkumar@hotmail.com>
' with than and regards to microsoft team
' *********************************************************
Option Explicit
'
' Win32 APIs to determine OS information.
'
Private Declare Function GetVersionEx Lib "kernel32" Alias "GetVersionExA"
(lpVersionInformation As OSVERSIONINFO) As Long
Private Type OSVERSIONINFO
dwOSVersionInfoSize As Long
dwMajorVersion As Long
dwMinorVersion As Long
dwBuildNumber As Long
dwPlatformId As Long
szCSDVersion As String * 128
End Type
Private Const VER_PLATFORM_WIN32s = 0
Private Const VER_PLATFORM_WIN32_WINDOWS = 1
Private Const VER_PLATFORM_WIN32_NT = 2
'
' Win32 NetAPIs.
'
Private Declare Function NetWkstaGetInfo Lib "Netapi32.dll" (lpServer As
Any, ByVal Level As Long, lpBuffer As Any) As Long
Private Declare Function NetWkstaUserGetInfo Lib "Netapi32.dll" (ByVal reserved
As Any, ByVal Level As Long, lpBuffer As Any) As Long
Private Declare Function NetApiBufferFree Lib "Netapi32.dll" (ByVal lpBuffer
As Long) As Long
Private Declare Function NetLocalGroupGetMembers Lib "netapi32" (lpServer
As Any, lpLocalGroup As Any, ByVal Level As Long, lpBuffer As Long, ByVal
MaxLen As Long, lpEntriesRead As Long, lpTotalEntries As Long, vResume As
Any) As Long

'
' Data handling APIs
'
Private Declare Sub CopyMem 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
Private Declare Function lstrcpyW Lib "kernel32" (lpString1 As Byte, ByVal
lpString2 As Long) As Long

Private Type WKSTA_INFO_102
wki102_platform_id As Long
wki102_computername As Long
wki102_langroup As Long
wki102_ver_major As Long
wki102_ver_minor As Long
wki102_lanroot As Long
wki102_logged_on_users As Long
End Type

Private Type WkstaInfo102
PlatformId As Long
ComputerName As String
LanGroup As String
VerMajor As Long
VerMinor As Long
LanRoot As String
LoggedOnUsers As Long
End Type

Private Type WKSTA_USER_INFO_1
wkui1_username As Long
wkui1_logon_domain As Long
wkui1_oth_domains As Long
wkui1_logon_server As Long
End Type

Private Type WkstaUserInfo1
UserName As String
LogonDomain As String
OtherDomains As String
LogonServer As String
End Type

Private Type GroupMemberInfo
UserName As String
Attribute As Long
End Type

Private Type ListOfMemberGroup
Init As Boolean
LastErr As Long
List() As GroupMemberInfo
End Type

Private Type LOCALGROUP_MEMBERS_INFO_API
Sid As Long
Attribute As Long
UserName As Long
End Type

Private Const NERR_Success As Long = 0&
Private Const NERR_MoreData = 234&

'
' Member variables
'
Private m_Wks As WkstaInfo102
Private m_User As WkstaUserInfo1
Private m_IsWinNT As Boolean

' *********************************************************
' Initialization
' *********************************************************
Private Sub Class_Initialize()
Dim os As OSVERSIONINFO
'
' Check to make sure we're running NT!
'
os.dwOSVersionInfoSize = Len(os)
Call GetVersionEx(os)
If os.dwPlatformId = VER_PLATFORM_WIN32_NT Then
m_IsWinNT = True
Me.Refresh
End If
End Sub

' *********************************************************
' Public Properties (Workstation)
' *********************************************************
Public Property Get ComputerName() As String
ComputerName = m_Wks.ComputerName
End Property

Public Property Get Domain() As String
Domain = m_Wks.LanGroup
End Property

Public Property Get LanRoot() As String
LanRoot = m_Wks.LanRoot
End Property

Public Property Get LoggedOnUsers() As Long
LoggedOnUsers = m_Wks.LoggedOnUsers
End Property

Public Property Get PlatformId() As Long
PlatformId = m_Wks.PlatformId
End Property

Public Property Get VerMajor() As Long
VerMajor = m_Wks.VerMajor
End Property

Public Property Get VerMinor() As Long
VerMinor = m_Wks.VerMinor
End Property

' *********************************************************
' Public Properties (Workstation User)
' *********************************************************
Public Property Get LogonDomain() As String
LogonDomain = m_User.LogonDomain
End Property

Public Property Get LogonServer() As String
LogonServer = m_User.LogonServer
End Property

Public Property Get OtherDomains() As String
OtherDomains = m_User.OtherDomains
End Property

Public Property Get UserName() As String
UserName = m_User.UserName
End Property

' *********************************************************
' Public Methods
' *********************************************************
Public Sub Refresh()
Dim lpBuffer As Long
Dim nRet As Long
Dim wki As WKSTA_INFO_102
Dim wkui As WKSTA_USER_INFO_1
'
' These functions only exist in Windows NT!!!
'
If Not m_IsWinNT Then Exit Sub
'
' Obtain workstation information
'
nRet = NetWkstaGetInfo(ByVal 0&, 102&, lpBuffer)
If nRet = NERR_Success Then
'
' Transfer data to VB-friendly structure
'
CopyMem wki, ByVal lpBuffer, Len(wki)
m_Wks.PlatformId = wki.wki102_platform_id
m_Wks.ComputerName = PointerToStringW(wki.wki102_computername)
m_Wks.LanGroup = PointerToStringW(wki.wki102_langroup)
m_Wks.VerMajor = wki.wki102_ver_major
m_Wks.VerMinor = wki.wki102_ver_minor
m_Wks.LanRoot = PointerToStringW(wki.wki102_lanroot)
m_Wks.LoggedOnUsers = wki.wki102_logged_on_users
'
' Clean up
'
If lpBuffer Then
Call NetApiBufferFree(lpBuffer)
End If
End If
'
' Obtain user information for this workstation
'
nRet = NetWkstaUserGetInfo(0&, 1&, lpBuffer)
If nRet = NERR_Success Then
'
' Transfer data to VB-friendly structure
'
CopyMem wkui, ByVal lpBuffer, Len(wkui)
m_User.UserName = PointerToStringW(wkui.wkui1_username)
m_User.LogonDomain = PointerToStringW(wkui.wkui1_logon_domain)
m_User.OtherDomains = PointerToStringW(wkui.wkui1_oth_domains)
m_User.LogonServer = PointerToStringW(wkui.wkui1_logon_server)
'
' Clean up
'
If lpBuffer Then
Call NetApiBufferFree(lpBuffer)
End If
End If
End Sub

' *********************************************************
' Private Methods
' *********************************************************
Private Function PointerToStringW(lpStringW As Long) As String
Dim buffer() As Byte
Dim nLen As Long

If lpStringW Then
nLen = lstrlenW(lpStringW) * 2
If nLen Then
ReDim buffer(0 To (nLen - 1)) As Byte
CopyMem buffer(0), ByVal lpStringW, nLen
PointerToStringW = buffer
End If
End If
End Function

'Ritorna un elenco dei membri di un gruppo locale
'Uses the win api functions to retrieve list of local groups a user belongs
Private Function LocalGroupsGetMember(Server As String, Group As String)
As ListOfMemberGroup
Dim yServer() As Byte
Dim yGroup() As Byte
Dim lRetCode As Long
Dim nRead As Long, nTotal As Long
Dim nRet As Long, nResume As Long
Dim PrefMaxLen As Long
Dim i As Long, x As Long
Dim tGroupInfo As LOCALGROUP_MEMBERS_INFO_API
Dim lGroupInfo As Long
Dim lGroupInfoPtr As Long
Dim GroupInfo As GroupMemberInfo
Dim GrpList As ListOfMemberGroup

yServer = MakeServerName(ByVal Server)
yGroup = Group & vbNullChar
PrefMaxLen = 65536

nRet = NERR_MoreData
Do While (nRet = NERR_MoreData)

nRet = NetLocalGroupGetMembers(yServer(0), yGroup(0), 1, lGroupInfo,
PrefMaxLen, nRead, nTotal, nResume)

If (nRet <> NERR_Success And _
nRet <> NERR_MoreData) Then
GrpList.Init = False
GrpList.LastErr = nRet
Exit Do
End If

lGroupInfoPtr = lGroupInfo

x = 1
Do While x <= nRead

CopyMem tGroupInfo, ByVal lGroupInfoPtr, Len(tGroupInfo)

GroupInfo.UserName = PointerToStringW(tGroupInfo.UserName)
'If GroupInfo.UserName = "sunil" Then MsgBox GroupInfo.UserName
GroupInfo.Attribute = tGroupInfo.Attribute
i = i + 1
ReDim Preserve GrpList.List(1 To i) As GroupMemberInfo
GrpList.List(i) = GroupInfo
x = x + 1

lGroupInfoPtr = lGroupInfoPtr + Len(tGroupInfo)

Loop

lRetCode = NetApiBufferFree(lGroupInfo)
GrpList.Init = (x > 1)

Loop

LocalGroupsGetMember = GrpList

End Function

'Used by the private function LocalGroupsGetMember
Private Function MakeServerName(ByVal ServerName As String)
Dim yServer() As Byte

If ServerName <> "" Then
If InStr(1, ServerName, "\\") = 0 Then
ServerName = "\\" & ServerName
End If
End If

yServer = ServerName & vbNullChar
MakeServerName = yServer

End Function


' *********************************************************
' Public Methods
' Pass the name of group as input string
' returns True if current user is in the group specified as in parameter
' else returns False
' *********************************************************

Public Function CheckCurrentUserInGroup(GrpItem As String) As Boolean

Dim GrpList As ListOfMemberGroup
Dim i As Integer

'Local Group
GrpList = LocalGroupsGetMember(ComputerName, GrpItem)

'if the grplist is not initilised ie., no corresponding entries then exit
If GrpList.Init = False Then

CheckCurrentUserInGroup = False

Else

For i = 1 To UBound(GrpList.List)
'if user and group match then return true and exit
If UserName = GrpList.List(i).UserName Then
CheckCurrentUserInGroup = True
Exit Function
Else
CheckCurrentUserInGroup = False
End If
Next

End If

End Function

' *********************************************************
' Public Methods
' returns a string array of groups to which the user belongs
' *********************************************************

Public Function UsersInGroup(ByVal GrpName As String) As String()
Dim GrpList As ListOfMemberGroup
Dim i As Integer, aUser() As String

'Local Group
GrpList = LocalGroupsGetMember(ComputerName, GrpName)

'if the grplist is not initilised ie., no corresponding entries.
If GrpList.Init = False Then
UsersInGroup = aUser()
Else
ReDim aUser(1 To UBound(GrpList.List))
For i = 1 To UBound(GrpList.List)
aUser(i) = GrpList.List(i).UserName
Next
UsersInGroup = aUser()
End If

End Function


*****************************************************************


"Amy" <agstephens@hotmail.com> wrote:
>
>Can anyone tell me the API call to use to find the domain and username of
>the currently logged on user to use to authenticate wen allowing access
to
>a VB app? The person before me tried to use LookupAccountName but it doesn't
>seem to be working, it's returning the machine name instead of the domain.
>Any ideas?

[sunil j]

hai amy <agstephens@hotmail.com>
i am pasting the code here as a class module named ..... to use in ur VB
project.
copy all the data in between the 2 starred lines into a notepad and save
it as CNTUserWKstn.cls file to be used in ur VB project. go thru this class
file in a object browser. u will find properties like domain, loggedOnuser
etc

regards
sunilj
<jsunilkumar@hotmail.com>
*****************************************************************
VERSION 1.0 CLASS
BEGIN
MultiUse = -1 'True
Persistable = 0 'NotPersistable
DataBindingBehavior = 0 'vbNone
DataSourceBehavior = 0 'vbNone
MTSTransactionMode = 0 'NotAnMTSObject
END
Attribute VB_Name = "CNTUserWKstn"
Attribute VB_GlobalNameSpace = False
Attribute VB_Creatable = True
Attribute VB_PredeclaredId = False
Attribute VB_Exposed = False
' *********************************************************
' Copyright (C)2000 for modifying , J. Sunil Kumar Email <jsunilkumar@hotmail.com>
' with than and regards to microsoft team
' *********************************************************
Option Explicit
'
' Win32 APIs to determine OS information.
'
Private Declare Function GetVersionEx Lib "kernel32" Alias "GetVersionExA"
(lpVersionInformation As OSVERSIONINFO) As Long
Private Type OSVERSIONINFO
dwOSVersionInfoSize As Long
dwMajorVersion As Long
dwMinorVersion As Long
dwBuildNumber As Long
dwPlatformId As Long
szCSDVersion As String * 128
End Type
Private Const VER_PLATFORM_WIN32s = 0
Private Const VER_PLATFORM_WIN32_WINDOWS = 1
Private Const VER_PLATFORM_WIN32_NT = 2
'
' Win32 NetAPIs.
'
Private Declare Function NetWkstaGetInfo Lib "Netapi32.dll" (lpServer As
Any, ByVal Level As Long, lpBuffer As Any) As Long
Private Declare Function NetWkstaUserGetInfo Lib "Netapi32.dll" (ByVal reserved
As Any, ByVal Level As Long, lpBuffer As Any) As Long
Private Declare Function NetApiBufferFree Lib "Netapi32.dll" (ByVal lpBuffer
As Long) As Long
Private Declare Function NetLocalGroupGetMembers Lib "netapi32" (lpServer
As Any, lpLocalGroup As Any, ByVal Level As Long, lpBuffer As Long, ByVal
MaxLen As Long, lpEntriesRead As Long, lpTotalEntries As Long, vResume As
Any) As Long

'
' Data handling APIs
'
Private Declare Sub CopyMem 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
Private Declare Function lstrcpyW Lib "kernel32" (lpString1 As Byte, ByVal
lpString2 As Long) As Long

Private Type WKSTA_INFO_102
wki102_platform_id As Long
wki102_computername As Long
wki102_langroup As Long
wki102_ver_major As Long
wki102_ver_minor As Long
wki102_lanroot As Long
wki102_logged_on_users As Long
End Type

Private Type WkstaInfo102
PlatformId As Long
ComputerName As String
LanGroup As String
VerMajor As Long
VerMinor As Long
LanRoot As String
LoggedOnUsers As Long
End Type

Private Type WKSTA_USER_INFO_1
wkui1_username As Long
wkui1_logon_domain As Long
wkui1_oth_domains As Long
wkui1_logon_server As Long
End Type

Private Type WkstaUserInfo1
UserName As String
LogonDomain As String
OtherDomains As String
LogonServer As String
End Type

Private Type GroupMemberInfo
UserName As String
Attribute As Long
End Type

Private Type ListOfMemberGroup
Init As Boolean
LastErr As Long
List() As GroupMemberInfo
End Type

Private Type LOCALGROUP_MEMBERS_INFO_API
Sid As Long
Attribute As Long
UserName As Long
End Type

Private Const NERR_Success As Long = 0&
Private Const NERR_MoreData = 234&

'
' Member variables
'
Private m_Wks As WkstaInfo102
Private m_User As WkstaUserInfo1
Private m_IsWinNT As Boolean

' *********************************************************
' Initialization
' *********************************************************
Private Sub Class_Initialize()
Dim os As OSVERSIONINFO
'
' Check to make sure we're running NT!
'
os.dwOSVersionInfoSize = Len(os)
Call GetVersionEx(os)
If os.dwPlatformId = VER_PLATFORM_WIN32_NT Then
m_IsWinNT = True
Me.Refresh
End If
End Sub

' *********************************************************
' Public Properties (Workstation)
' *********************************************************
Public Property Get ComputerName() As String
ComputerName = m_Wks.ComputerName
End Property

Public Property Get Domain() As String
Domain = m_Wks.LanGroup
End Property

Public Property Get LanRoot() As String
LanRoot = m_Wks.LanRoot
End Property

Public Property Get LoggedOnUsers() As Long
LoggedOnUsers = m_Wks.LoggedOnUsers
End Property

Public Property Get PlatformId() As Long
PlatformId = m_Wks.PlatformId
End Property

Public Property Get VerMajor() As Long
VerMajor = m_Wks.VerMajor
End Property

Public Property Get VerMinor() As Long
VerMinor = m_Wks.VerMinor
End Property

' *********************************************************
' Public Properties (Workstation User)
' *********************************************************
Public Property Get LogonDomain() As String
LogonDomain = m_User.LogonDomain
End Property

Public Property Get LogonServer() As String
LogonServer = m_User.LogonServer
End Property

Public Property Get OtherDomains() As String
OtherDomains = m_User.OtherDomains
End Property

Public Property Get UserName() As String
UserName = m_User.UserName
End Property

' *********************************************************
' Public Methods
' *********************************************************
Public Sub Refresh()
Dim lpBuffer As Long
Dim nRet As Long
Dim wki As WKSTA_INFO_102
Dim wkui As WKSTA_USER_INFO_1
'
' These functions only exist in Windows NT!!!
'
If Not m_IsWinNT Then Exit Sub
'
' Obtain workstation information
'
nRet = NetWkstaGetInfo(ByVal 0&, 102&, lpBuffer)
If nRet = NERR_Success Then
'
' Transfer data to VB-friendly structure
'
CopyMem wki, ByVal lpBuffer, Len(wki)
m_Wks.PlatformId = wki.wki102_platform_id
m_Wks.ComputerName = PointerToStringW(wki.wki102_computername)
m_Wks.LanGroup = PointerToStringW(wki.wki102_langroup)
m_Wks.VerMajor = wki.wki102_ver_major
m_Wks.VerMinor = wki.wki102_ver_minor
m_Wks.LanRoot = PointerToStringW(wki.wki102_lanroot)
m_Wks.LoggedOnUsers = wki.wki102_logged_on_users
'
' Clean up
'
If lpBuffer Then
Call NetApiBufferFree(lpBuffer)
End If
End If
'
' Obtain user information for this workstation
'
nRet = NetWkstaUserGetInfo(0&, 1&, lpBuffer)
If nRet = NERR_Success Then
'
' Transfer data to VB-friendly structure
'
CopyMem wkui, ByVal lpBuffer, Len(wkui)
m_User.UserName = PointerToStringW(wkui.wkui1_username)
m_User.LogonDomain = PointerToStringW(wkui.wkui1_logon_domain)
m_User.OtherDomains = PointerToStringW(wkui.wkui1_oth_domains)
m_User.LogonServer = PointerToStringW(wkui.wkui1_logon_server)
'
' Clean up
'
If lpBuffer Then
Call NetApiBufferFree(lpBuffer)
End If
End If
End Sub

' *********************************************************
' Private Methods
' *********************************************************
Private Function PointerToStringW(lpStringW As Long) As String
Dim buffer() As Byte
Dim nLen As Long

If lpStringW Then
nLen = lstrlenW(lpStringW) * 2
If nLen Then
ReDim buffer(0 To (nLen - 1)) As Byte
CopyMem buffer(0), ByVal lpStringW, nLen
PointerToStringW = buffer
End If
End If
End Function

'Ritorna un elenco dei membri di un gruppo locale
'Uses the win api functions to retrieve list of local groups a user belongs
Private Function LocalGroupsGetMember(Server As String, Group As String)
As ListOfMemberGroup
Dim yServer() As Byte
Dim yGroup() As Byte
Dim lRetCode As Long
Dim nRead As Long, nTotal As Long
Dim nRet As Long, nResume As Long
Dim PrefMaxLen As Long
Dim i As Long, x As Long
Dim tGroupInfo As LOCALGROUP_MEMBERS_INFO_API
Dim lGroupInfo As Long
Dim lGroupInfoPtr As Long
Dim GroupInfo As GroupMemberInfo
Dim GrpList As ListOfMemberGroup

yServer = MakeServerName(ByVal Server)
yGroup = Group & vbNullChar
PrefMaxLen = 65536

nRet = NERR_MoreData
Do While (nRet = NERR_MoreData)

nRet = NetLocalGroupGetMembers(yServer(0), yGroup(0), 1, lGroupInfo,
PrefMaxLen, nRead, nTotal, nResume)

If (nRet <> NERR_Success And _
nRet <> NERR_MoreData) Then
GrpList.Init = False
GrpList.LastErr = nRet
Exit Do
End If

lGroupInfoPtr = lGroupInfo

x = 1
Do While x <= nRead

CopyMem tGroupInfo, ByVal lGroupInfoPtr, Len(tGroupInfo)

GroupInfo.UserName = PointerToStringW(tGroupInfo.UserName)
'If GroupInfo.UserName = "sunil" Then MsgBox GroupInfo.UserName
GroupInfo.Attribute = tGroupInfo.Attribute
i = i + 1
ReDim Preserve GrpList.List(1 To i) As GroupMemberInfo
GrpList.List(i) = GroupInfo
x = x + 1

lGroupInfoPtr = lGroupInfoPtr + Len(tGroupInfo)

Loop

lRetCode = NetApiBufferFree(lGroupInfo)
GrpList.Init = (x > 1)

Loop

LocalGroupsGetMember = GrpList

End Function

'Used by the private function LocalGroupsGetMember
Private Function MakeServerName(ByVal ServerName As String)
Dim yServer() As Byte

If ServerName <> "" Then
If InStr(1, ServerName, "\\") = 0 Then
ServerName = "\\" & ServerName
End If
End If

yServer = ServerName & vbNullChar
MakeServerName = yServer

End Function


' *********************************************************
' Public Methods
' Pass the name of group as input string
' returns True if current user is in the group specified as in parameter
' else returns False
' *********************************************************

Public Function CheckCurrentUserInGroup(GrpItem As String) As Boolean

Dim GrpList As ListOfMemberGroup
Dim i As Integer

'Local Group
GrpList = LocalGroupsGetMember(ComputerName, GrpItem)

'if the grplist is not initilised ie., no corresponding entries then exit
If GrpList.Init = False Then

CheckCurrentUserInGroup = False

Else

For i = 1 To UBound(GrpList.List)
'if user and group match then return true and exit
If UserName = GrpList.List(i).UserName Then
CheckCurrentUserInGroup = True
Exit Function
Else
CheckCurrentUserInGroup = False
End If
Next

End If

End Function

' *********************************************************
' Public Methods
' returns a string array of groups to which the user belongs
' *********************************************************

Public Function UsersInGroup(ByVal GrpName As String) As String()
Dim GrpList As ListOfMemberGroup
Dim i As Integer, aUser() As String

'Local Group
GrpList = LocalGroupsGetMember(ComputerName, GrpName)

'if the grplist is not initilised ie., no corresponding entries.
If GrpList.Init = False Then
UsersInGroup = aUser()
Else
ReDim aUser(1 To UBound(GrpList.List))
For i = 1 To UBound(GrpList.List)
aUser(i) = GrpList.List(i).UserName
Next
UsersInGroup = aUser()
End If

End Function


*****************************************************************


"Amy" <agstephens@hotmail.com> wrote:
>
>Can anyone tell me the API call to use to find the domain and username of
>the currently logged on user to use to authenticate wen allowing access
to
>a VB app? The person before me tried to use LookupAccountName but it doesn't
>seem to be working, it's returning the machine name instead of the domain.
>Any ideas?

[sunil j]

hai amy <agstephens@hotmail.com>
i am pasting the code here as a class module named ..... to use in ur VB
project.
copy all the data in between the 2 starred lines into a notepad and save
it as CNTUserWKstn.cls file to be used in ur VB project. go thru this class
file in a object browser. u will find properties like domain, loggedOnuser
etc

regards
sunilj
<jsunilkumar@hotmail.com>
*****************************************************************
VERSION 1.0 CLASS
BEGIN
MultiUse = -1 'True
Persistable = 0 'NotPersistable
DataBindingBehavior = 0 'vbNone
DataSourceBehavior = 0 'vbNone
MTSTransactionMode = 0 'NotAnMTSObject
END
Attribute VB_Name = "CNTUserWKstn"
Attribute VB_GlobalNameSpace = False
Attribute VB_Creatable = True
Attribute VB_PredeclaredId = False
Attribute VB_Exposed = False
' *********************************************************
' Copyright (C)2000 for modifying , J. Sunil Kumar Email <jsunilkumar@hotmail.com>
' with than and regards to microsoft team
' *********************************************************
Option Explicit
'
' Win32 APIs to determine OS information.
'
Private Declare Function GetVersionEx Lib "kernel32" Alias "GetVersionExA"
(lpVersionInformation As OSVERSIONINFO) As Long
Private Type OSVERSIONINFO
dwOSVersionInfoSize As Long
dwMajorVersion As Long
dwMinorVersion As Long
dwBuildNumber As Long
dwPlatformId As Long
szCSDVersion As String * 128
End Type
Private Const VER_PLATFORM_WIN32s = 0
Private Const VER_PLATFORM_WIN32_WINDOWS = 1
Private Const VER_PLATFORM_WIN32_NT = 2
'
' Win32 NetAPIs.
'
Private Declare Function NetWkstaGetInfo Lib "Netapi32.dll" (lpServer As
Any, ByVal Level As Long, lpBuffer As Any) As Long
Private Declare Function NetWkstaUserGetInfo Lib "Netapi32.dll" (ByVal reserved
As Any, ByVal Level As Long, lpBuffer As Any) As Long
Private Declare Function NetApiBufferFree Lib "Netapi32.dll" (ByVal lpBuffer
As Long) As Long
Private Declare Function NetLocalGroupGetMembers Lib "netapi32" (lpServer
As Any, lpLocalGroup As Any, ByVal Level As Long, lpBuffer As Long, ByVal
MaxLen As Long, lpEntriesRead As Long, lpTotalEntries As Long, vResume As
Any) As Long

'
' Data handling APIs
'
Private Declare Sub CopyMem 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
Private Declare Function lstrcpyW Lib "kernel32" (lpString1 As Byte, ByVal
lpString2 As Long) As Long

Private Type WKSTA_INFO_102
wki102_platform_id As Long
wki102_computername As Long
wki102_langroup As Long
wki102_ver_major As Long
wki102_ver_minor As Long
wki102_lanroot As Long
wki102_logged_on_users As Long
End Type

Private Type WkstaInfo102
PlatformId As Long
ComputerName As String
LanGroup As String
VerMajor As Long
VerMinor As Long
LanRoot As String
LoggedOnUsers As Long
End Type

Private Type WKSTA_USER_INFO_1
wkui1_username As Long
wkui1_logon_domain As Long
wkui1_oth_domains As Long
wkui1_logon_server As Long
End Type

Private Type WkstaUserInfo1
UserName As String
LogonDomain As String
OtherDomains As String
LogonServer As String
End Type

Private Type GroupMemberInfo
UserName As String
Attribute As Long
End Type

Private Type ListOfMemberGroup
Init As Boolean
LastErr As Long
List() As GroupMemberInfo
End Type

Private Type LOCALGROUP_MEMBERS_INFO_API
Sid As Long
Attribute As Long
UserName As Long
End Type

Private Const NERR_Success As Long = 0&
Private Const NERR_MoreData = 234&

'
' Member variables
'
Private m_Wks As WkstaInfo102
Private m_User As WkstaUserInfo1
Private m_IsWinNT As Boolean

' *********************************************************
' Initialization
' *********************************************************
Private Sub Class_Initialize()
Dim os As OSVERSIONINFO
'
' Check to make sure we're running NT!
'
os.dwOSVersionInfoSize = Len(os)
Call GetVersionEx(os)
If os.dwPlatformId = VER_PLATFORM_WIN32_NT Then
m_IsWinNT = True
Me.Refresh
End If
End Sub

' *********************************************************
' Public Properties (Workstation)
' *********************************************************
Public Property Get ComputerName() As String
ComputerName = m_Wks.ComputerName
End Property

Public Property Get Domain() As String
Domain = m_Wks.LanGroup
End Property

Public Property Get LanRoot() As String
LanRoot = m_Wks.LanRoot
End Property

Public Property Get LoggedOnUsers() As Long
LoggedOnUsers = m_Wks.LoggedOnUsers
End Property

Public Property Get PlatformId() As Long
PlatformId = m_Wks.PlatformId
End Property

Public Property Get VerMajor() As Long
VerMajor = m_Wks.VerMajor
End Property

Public Property Get VerMinor() As Long
VerMinor = m_Wks.VerMinor
End Property

' *********************************************************
' Public Properties (Workstation User)
' *********************************************************
Public Property Get LogonDomain() As String
LogonDomain = m_User.LogonDomain
End Property

Public Property Get LogonServer() As String
LogonServer = m_User.LogonServer
End Property

Public Property Get OtherDomains() As String
OtherDomains = m_User.OtherDomains
End Property

Public Property Get UserName() As String
UserName = m_User.UserName
End Property

' *********************************************************
' Public Methods
' *********************************************************
Public Sub Refresh()
Dim lpBuffer As Long
Dim nRet As Long
Dim wki As WKSTA_INFO_102
Dim wkui As WKSTA_USER_INFO_1
'
' These functions only exist in Windows NT!!!
'
If Not m_IsWinNT Then Exit Sub
'
' Obtain workstation information
'
nRet = NetWkstaGetInfo(ByVal 0&, 102&, lpBuffer)
If nRet = NERR_Success Then
'
' Transfer data to VB-friendly structure
'
CopyMem wki, ByVal lpBuffer, Len(wki)
m_Wks.PlatformId = wki.wki102_platform_id
m_Wks.ComputerName = PointerToStringW(wki.wki102_computername)
m_Wks.LanGroup = PointerToStringW(wki.wki102_langroup)
m_Wks.VerMajor = wki.wki102_ver_major
m_Wks.VerMinor = wki.wki102_ver_minor
m_Wks.LanRoot = PointerToStringW(wki.wki102_lanroot)
m_Wks.LoggedOnUsers = wki.wki102_logged_on_users
'
' Clean up
'
If lpBuffer Then
Call NetApiBufferFree(lpBuffer)
End If
End If
'
' Obtain user information for this workstation
'
nRet = NetWkstaUserGetInfo(0&, 1&, lpBuffer)
If nRet = NERR_Success Then
'
' Transfer data to VB-friendly structure
'
CopyMem wkui, ByVal lpBuffer, Len(wkui)
m_User.UserName = PointerToStringW(wkui.wkui1_username)
m_User.LogonDomain = PointerToStringW(wkui.wkui1_logon_domain)
m_User.OtherDomains = PointerToStringW(wkui.wkui1_oth_domains)
m_User.LogonServer = PointerToStringW(wkui.wkui1_logon_server)
'
' Clean up
'
If lpBuffer Then
Call NetApiBufferFree(lpBuffer)
End If
End If
End Sub

' *********************************************************
' Private Methods
' *********************************************************
Private Function PointerToStringW(lpStringW As Long) As String
Dim buffer() As Byte
Dim nLen As Long

If lpStringW Then
nLen = lstrlenW(lpStringW) * 2
If nLen Then
ReDim buffer(0 To (nLen - 1)) As Byte
CopyMem buffer(0), ByVal lpStringW, nLen
PointerToStringW = buffer
End If
End If
End Function

'Ritorna un elenco dei membri di un gruppo locale
'Uses the win api functions to retrieve list of local groups a user belongs
Private Function LocalGroupsGetMember(Server As String, Group As String)
As ListOfMemberGroup
Dim yServer() As Byte
Dim yGroup() As Byte
Dim lRetCode As Long
Dim nRead As Long, nTotal As Long
Dim nRet As Long, nResume As Long
Dim PrefMaxLen As Long
Dim i As Long, x As Long
Dim tGroupInfo As LOCALGROUP_MEMBERS_INFO_API
Dim lGroupInfo As Long
Dim lGroupInfoPtr As Long
Dim GroupInfo As GroupMemberInfo
Dim GrpList As ListOfMemberGroup

yServer = MakeServerName(ByVal Server)
yGroup = Group & vbNullChar
PrefMaxLen = 65536

nRet = NERR_MoreData
Do While (nRet = NERR_MoreData)

nRet = NetLocalGroupGetMembers(yServer(0), yGroup(0), 1, lGroupInfo,
PrefMaxLen, nRead, nTotal, nResume)

If (nRet <> NERR_Success And _
nRet <> NERR_MoreData) Then
GrpList.Init = False
GrpList.LastErr = nRet
Exit Do
End If

lGroupInfoPtr = lGroupInfo

x = 1
Do While x <= nRead

CopyMem tGroupInfo, ByVal lGroupInfoPtr, Len(tGroupInfo)

GroupInfo.UserName = PointerToStringW(tGroupInfo.UserName)
'If GroupInfo.UserName = "sunil" Then MsgBox GroupInfo.UserName
GroupInfo.Attribute = tGroupInfo.Attribute
i = i + 1
ReDim Preserve GrpList.List(1 To i) As GroupMemberInfo
GrpList.List(i) = GroupInfo
x = x + 1

lGroupInfoPtr = lGroupInfoPtr + Len(tGroupInfo)

Loop

lRetCode = NetApiBufferFree(lGroupInfo)
GrpList.Init = (x > 1)

Loop

LocalGroupsGetMember = GrpList

End Function

'Used by the private function LocalGroupsGetMember
Private Function MakeServerName(ByVal ServerName As String)
Dim yServer() As Byte

If ServerName <> "" Then
If InStr(1, ServerName, "\\") = 0 Then
ServerName = "\\" & ServerName
End If
End If

yServer = ServerName & vbNullChar
MakeServerName = yServer

End Function


' *********************************************************
' Public Methods
' Pass the name of group as input string
' returns True if current user is in the group specified as in parameter
' else returns False
' *********************************************************

Public Function CheckCurrentUserInGroup(GrpItem As String) As Boolean

Dim GrpList As ListOfMemberGroup
Dim i As Integer

'Local Group
GrpList = LocalGroupsGetMember(ComputerName, GrpItem)

'if the grplist is not initilised ie., no corresponding entries then exit
If GrpList.Init = False Then

CheckCurrentUserInGroup = False

Else

For i = 1 To UBound(GrpList.List)
'if user and group match then return true and exit
If UserName = GrpList.List(i).UserName Then
CheckCurrentUserInGroup = True
Exit Function
Else
CheckCurrentUserInGroup = False
End If
Next

End If

End Function

' *********************************************************
' Public Methods
' returns a string array of groups to which the user belongs
' *********************************************************

Public Function UsersInGroup(ByVal GrpName As String) As String()
Dim GrpList As ListOfMemberGroup
Dim i As Integer, aUser() As String

'Local Group
GrpList = LocalGroupsGetMember(ComputerName, GrpName)

'if the grplist is not initilised ie., no corresponding entries.
If GrpList.Init = False Then
UsersInGroup = aUser()
Else
ReDim aUser(1 To UBound(GrpList.List))
For i = 1 To UBound(GrpList.List)
aUser(i) = GrpList.List(i).UserName
Next
UsersInGroup = aUser()
End If

End Function


*****************************************************************


"Amy" <agstephens@hotmail.com> wrote:
>
>Can anyone tell me the API call to use to find the domain and username of
>the currently logged on user to use to authenticate wen allowing access
to
>a VB app? The person before me tried to use LookupAccountName but it doesn't
>seem to be working, it's returning the machine name instead of the domain.
>Any ideas?