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Reset NT password with ‘User Must Change Password’

Question:
We are trying to reset the NT password using structure USER_INFO_1003. Everything worked fine. Then we also needed to set ‘User Must Change Password at Next Logon’ option. There is no structure just to change that. What I can find is that the only structure I can use is USER_INFO_3.This means that I have to user NetUserGetInfo() API to get all the user info using USER_INFO_3and then use NetUserSetInfo() API to reset everything back except ‘usri3_password_expired’value. This seems like a lot of work just to change one data value. On top of everything, I haven’t been able to get this to work using both APIs. I get an error code 87: invalid parameter value. I am using VB6 for this.

Answer:
It may be a lot of work, but it is the way you will have to do it. The following will reset the “Test guest account” to force a password change on the next logon. Note that this will work on a LOCAL machine. If you want to do it remotely, you must pass the Server name to the function.

IN FORM:Private Sub Command1_Click()   Dim p_strUserName          As String      p_strUserName = "Test guest account"      If Module1.MustChangePassword(p_strUserName) = True Then      MsgBox "Successfully set 'Must Change Password' for user '" & _         p_strUserName & "'."   Else      MsgBox "Failed setting 'Must Change Password' for user '" & _         p_strUserName & "'."   End If   End SubIN BAS or CLS file:Option ExplicitPublic Declare Sub CopyMem Lib "kernel32" Alias _   "RtlMoveMemory" (pTo As Any, pFrom As Any, _   ByVal lCount As Long)Private Declare Function NetApiBufferFree _   Lib "netapi32.dll" _   (ByVal lngPtrBuffer As Long) As LongPrivate Declare Function NetUserSetInfo _   Lib "netapi32" _   (psServer As Byte, _    psUser As Byte, _    ByVal lLevel As Long, _    ByVal pPtrBuffer As Long, _    ParmErr As Long) As LongPrivate Declare Function NetUserGetInfo _   Lib "netapi32" _   (ServerName As Byte, _    UserName As Byte, _    ByVal Level As Long, _    lpBuffer As Long) As LongPrivate Const NERR_Success As Long = 0&Private Const UserInfo3 As Long = 3&Private Type USER_INFO_3_API   usri3_name              As Long   usri3_password          As Long   usri3_password_age      As Long   usri3_priv              As Long   usri3_home_dir          As Long   usri3_comment           As Long   usri3_flags             As Long   usri3_script_path       As Long   usri3_auth_flags        As Long   usri3_full_name         As Long   usri3_usr_comment       As Long   usri3_parms             As Long   usri3_workstations      As Long   usri3_lastlogon         As Long   usri3_lastlogoff        As Long   usri3_acct_expires      As Long   usri3_max_storage       As Long   usri3_units_per_week    As Long   usri3_logon_hours       As Long   usri3_bad_pw_count      As Long   usri3_num_logons        As Long   usri3_logon_server      As Long   usri3_country_code      As Long   usri3_code_page         As Long   usri3_user_id           As Long   usri3_primary_group_id  As Long   usri3_profile           As Long   usri3_home_dir_drive    As Long   usri3_password_expired  As LongEnd TypePublic Function MustChangePassword(ByVal xi_strUserName As String) As Boolean   Dim p_typUserInfo3API   As USER_INFO_3_API   Dim p_bytSvrName()      As Byte   Dim p_bytUserName()     As Byte   Dim p_strServerName     As String   Dim p_lngBuffer         As Long   Dim p_lngParmErr        As Long   Dim p_lngRtn            As Long      ' ------------------------------------------   ' Convert the server name to byte array   ' ------------------------------------------   p_strServerName = vbNullChar   p_bytSvrName = p_strServerName      ' ------------------------------------------   ' Convert the user name to a byte array   ' ------------------------------------------   If Len(Trim$(xi_strUserName)) = 0 Then      Exit Function 'Handle the error   Else      p_bytUserName = xi_strUserName & vbNullChar   End If      ' ------------------------------------------   ' Get the current info   ' ------------------------------------------   p_lngRtn = NetUserGetInfo(p_bytSvrName(0), _                             p_bytUserName(0), _                             UserInfo3, _                             p_lngBuffer)   If p_lngRtn = NERR_Success Then      CopyMem p_typUserInfo3API, _              ByVal p_lngBuffer, _              Len(p_typUserInfo3API)   Else      MsgBox "Error Number: " & p_lngRtn   End If      ' ------------------------------------------   ' Set the current info   ' ------------------------------------------   p_typUserInfo3API.usri3_password_expired = 1   p_lngBuffer = VarPtr(p_typUserInfo3API)      p_lngRtn = NetUserSetInfo(p_bytSvrName(0), _                             p_bytUserName(0), _                             UserInfo3, _                             p_lngBuffer, _                             p_lngParmErr)   If p_lngRtn = NERR_Success Then      CopyMem p_typUserInfo3API, _              ByVal p_lngBuffer, _              Len(p_typUserInfo3API)      MustChangePassword = True   Else      MsgBox "Error Number: " & p_lngRtn   End If         ' ------------------------------------------   ' Clear the buffer   ' ------------------------------------------   If p_lngBuffer Then      NetApiBufferFree p_lngBuffer   End If      End Function

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