by Jon Barker (11 Submissions)
Category: Windows API Call/Explanation
Compatability: Visual Basic 3.0
Difficulty: Intermediate
Date Added: Wed 3rd February 2021
Rating: 
(7 Votes)
This code, using the windows API (NetUserChangePassword) call can change any users password on the network you are on, provided you know their original password. You need to know:
1. The machine name (ie. \\jon)
2. The username (NOT case sensitive) (ie. the_cleaner)
3. The old password (ie. password)
4. the new password (ie. password2)
Enjoy!
VBcoders'PASTE THE FOLLOWING INTO ANY FORM...
'YOU MUST HAVE A COMMAND BUTTON
'NAMED 'COMMAND1'
Option Explicit
Private Declare Function NetUserChangePassword Lib "netapi32.dll" ( _
ByVal domainname As String, ByVal Username As String, _
ByVal OldPassword As String, ByVal NewPassword As String) As Long
Private Sub Command1_Click()
On Error GoTo error
Dim r As Long
Dim sServer As String
Dim sUser As String
Dim sOldPass As String
Dim sNewPass As String
sServer = StrConv("\\jon", vbUnicode)
sUser = StrConv("the_cleaner", vbUnicode)
sOldPass = StrConv("password", vbUnicode)
sNewPass = StrConv("password2", vbUnicode)
r = NetUserChangePassword(sServer, sUser, sOldPass, sNewPass)
If r <> 0 Then
MsgBox "Error! Could not change password. Ensure that: " & vbCrLf & vbCrLf & _
"o Old password was correct (Error 86)" & vbCrLf & _
"o The server name started with '\\' (Error 1351)", vbCritical, "Error: " & r
Else
MsgBox "Password changed successfully!", vbExclamation, "Changed Password"
End If
Exit Sub
error:
MsgBox "External error changing password: " & vbCrLf & vbCrLf & Err.Description, vbCritical, "Error: " & Err.Number
End Sub
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