Login | Register   
RSS Feed
Download our iPhone app
Browse DevX
Sign up for e-mail newsletters from DevX

By submitting your information, you agree that devx.com may send you DevX offers via email, phone and text message, as well as email offers about other products and services that DevX believes may be of interest to you. DevX will process your information in accordance with the Quinstreet Privacy Policy.

Tip of the Day
Language: NT
Expertise: Beginner
Oct 21, 1998



Building the Right Environment to Support AI, Machine Learning and Deep Learning

Finding User NAME on NT

My problem is that once I get the logged-on user id, I need to get their full name from the NT security. Is this possible? For example:

UID: jsmith123
Name: John Smith or Smith, John (however names are stored)

The following VB code will get you what you want (VB 4.0-32/VB 5.0/VB 6.0):

Option Explicit

Private m_strUserName      As String
Private m_strServerName    As String

Private Declare Function GetUserName _
   Lib "advapi32.dll" Alias "GetUserNameA" _
   (ByVal lpBuffer As String, _
    nSize As Long) As Long
Private Declare Function NetUserGetInfo _
   Lib "netapi32" _
   (ServerName As Byte, _
    UserName As Byte, _
    ByVal Level As Long, _
    lpBuffer As Long) As Long
Private Declare Function NetGetDCName _
   Lib "netapi32.dll" _
   (ServerName As Byte, _
    DomainName As Byte, _
    Buffer As Long) As Long
Private Declare Function NetApiBufferFree _
   Lib "netapi32" _
   (ByVal pBuffer As Long) As Long
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 lstrlen _
   Lib "kernel32" _
   (ByVal lpString As Long) As Long

Private Const constUserInfo10       As Long = 10

Private Type USER_INFO_10_API
   Name As Long
   Comment As Long
   UserComment As Long
   FullName As Long
End Type

Private Type USER_INFO_10
   Name As String
   Comment As String
   UserComment As String
   FullName As String
End Type

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

Private Sub GetPDC(ByVal xi_strServer As String, _
                   ByVal xi_strDomain As String, _
                   ByRef xo_strPDC_Name As String)
   Dim p_strTmp                        As String
   Dim p_lngRtn                        As Long
   Dim p_lngBufferPtr                  As Long
   Dim p_astrTmp(100)                  As Byte
   Dim p_abytServerName()              As Byte
   Dim p_abytDomainName()              As Byte
   Dim p_vntReplacementStrings         As Variant
   ' ------------------------------------------
   ' Move to byte array
   ' ------------------------------------------
   p_abytServerName = xi_strServer & vbNullChar
   p_abytDomainName = xi_strDomain & vbNullChar
   ' ------------------------------------------
   ' Get the name of the PDC
   ' ------------------------------------------
   p_lngRtn = NetGetDCName(p_abytServerName(0), _
                           p_abytDomainName(0), _
   ' ------------------------------------------
   ' Set the return value (zero is success)
   ' ------------------------------------------
   If p_lngRtn <> 0 Then
      Exit Sub
   End If
   ' Translate the name
   If p_lngRtn = 0 Then
      xo_strPDC_Name = PointerToStringW(p_lngBufferPtr)
      xo_strPDC_Name = ""
   End If
   ' Free the buffer
   NetApiBufferFree p_lngBufferPtr
End Sub

Public Function UserFullName() As String
   Dim p_typUserInfo                   As USER_INFO_10
   Dim p_typUserInfoAPI                As USER_INFO_10_API
   Dim p_lngBuffer                     As Long
   Dim p_bytServerName()               As Byte
   Dim p_bytUserName()                 As Byte
   Dim p_lngRtn                        As Long

   ' Get the server name
   If Len(Trim$(m_strServerName)) = 0 Then
      GetPDC "", "", m_strServerName
   End If
   ' Convert string to a pointer
   If Len(Trim$(m_strServerName)) = 0 Then
      'p_lngPtrServerName = 0&
      p_bytServerName = vbNullChar
      p_bytServerName = m_strServerName & vbNullChar
      'p_lngPtrServerName = StrPtr(m_strServerName)
   End If
   ' Make sure we have a user name
   If m_strUserName = vbNullString Then
      m_strUserName = Module1.UserName()
   End If
   ' Convert the user name to a pointer
   If Len(Trim$(m_strUserName)) = 0 Then
      Exit Function 'Handle the error
      p_bytUserName = m_strUserName & vbNullChar
   End If
   ' Get the current info
   p_lngRtn = NetUserGetInfo(p_bytServerName(0), _
                             p_bytUserName(0), _
                             constUserInfo10, _
   If p_lngRtn = NERR_Success Then
      CopyMem p_typUserInfoAPI, _
              ByVal p_lngBuffer, _
      p_typUserInfo.FullName = PointerToStringW(p_typUserInfoAPI.FullName)
      p_typUserInfo.Comment = PointerToStringW(p_typUserInfoAPI.Comment)
      p_typUserInfo.Name = PointerToStringW(p_typUserInfoAPI.Name)
      p_typUserInfo.UserComment = PointerToStringW(p_typUserInfoAPI.UserComment)
      UserFullName = p_typUserInfo.FullName
   End If
   If p_lngBuffer Then
      Call NetApiBufferFree(p_lngBuffer)
   End If
End Function

Public Function UserName() As String
   Dim p_strBuffer                     As String
   Dim p_lngBufSize                    As Long
   Dim p_strName                       As String
   Dim p_lngRtn                        As Long
   ' ------------------------------------------
   ' Retrieve the curent user's name from the
   '     operating system
   ' ------------------------------------------
   p_strBuffer = Space$(255)
   p_lngBufSize = Len(p_strBuffer)
   p_lngRtn = GetUserName(p_strBuffer, p_lngBufSize)
   ' ------------------------------------------
   ' If failed, then just put in a blank
   ' Otherwise, fill in user name on the form
   ' ------------------------------------------
   If p_lngRtn > 0 Then
      m_strUserName = Left$(p_strBuffer, p_lngBufSize - 1)
      m_strUserName = vbNullString
   End If
   UserName = m_strUserName
End Function

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
DevX Pro
Comment and Contribute






(Maximum characters: 1200). You have 1200 characters left.



Thanks for your registration, follow us on our social networks to keep up-to-date