So I got this code off the internet. The guy who made it said this, "I have done this in SQL Server.If u want to do in Acess Database just create a table name USERS then add two fields name user_name and user_pwd thats it."

I tried that and it didnt work. I dont know what to change in the code to make it access the Access Database named 'USERS'. Can someone help me?

Also, when i run it, i get this error code, "Run-time error '-2147467259 (80004005)': [Microsoft][ODBC Driver Manager] Data source name not found and no default driver specified."

The code in red is what it highlights during the error. I think the error is because I dont have SQL on my computer.

Dim cn As New ADODB.Connection
    Dim rs As New ADODB.Recordset
 

Private Sub Command10_Click()
'change password button
Dim ms As Integer
If Combo2.Text = "" Then MsgBox "Select User name", vbInformation, "Password change": Exit Sub

ms = MsgBox("Do you want really Change Password ? '" & Trim(UCase(Combo2.Text)) & "'", vbQuestion + vbYesNo, "Password change")
  
  If Text6.Text = "" Or Text7.Text = "" Then MsgBox "Enter New Password.", vbInformation, "Change Password"
  Text6.SetFocus
 
 If Trim(Text6.Text) <> Trim(Text7.Text) Then
     MsgBox "Password and Confirm Password are not matched.", vbInformation, "Confirm Password"
     Text6.Text = ""
     Text7.Text = ""
     Text6.SetFocus
 End If

If ms = vbYes Then
    Set rs = New ADODB.Recordset
    rs.Open "select *  from USERS where user_name ='" & Trim(UCase(Combo2.Text)) & "'", cn, 1, 2
    rs!user_pwd = Text6.Text
    rs.Update
   
   Text6.Text = ""
   Text7.Text = ""
End If
End Sub

Private Sub Command11_Click()
Frame5.Visible = True
Frame3.Visible = False
End Sub

Private Sub Command12_Click()
'password change ok button
 If Combo2.Text = "" Then MsgBox "Select User Name", vbInformation, "Password Change": Exit Sub
 If Text6.Text = "" Then MsgBox "Enter Password", vbInformation, "Password Change": Exit Sub
 If Text7.Text = "" Then MsgBox "Enter Confirm Password", vbInformation, "Password Change": Exit Sub
 
 If Trim(Text6.Text) <> Trim(Text7.Text) Then
     MsgBox "Password and Confirm Password are not matched.", vbInformation, "Confirm Password"
     
     Text6.Text = ""
     Text7.Text = ""
     Text6.SetFocus
   Else
   
     MsgBox "Your Password Sucessfully Changed", vbInformation, "Password Changed"
 End If
 
    Set rs = New ADODB.Recordset
    rs.Open "select *  from USERS where user_name ='" & Trim(UCase(Combo2.Text)) & "'", cn, 1, 2
    
     rs!user_pwd = Text6.Text
     rs.Update
      Text6.Text = ""
      Text7.Text = ""
       Exit Sub
           End Sub

Private Sub Command2_Click()
'delete user frame5
Combo1.Clear

Set rs = New ADODB.Recordset
rs.Open "select * from USERS order by user_name", cn, 1, 2

     
    If rs.RecordCount <> 0 Then
    
        If rs.EOF = True Then rs.MoveFirst
   
        Do Until rs.EOF
                         
            Combo1.AddItem Trim(rs!user_name)
            rs.MoveNext
        Loop
    End If
Frame2.Visible = True
Frame1.Visible = False
Frame3.Visible = False
'Frame4.Visible = False
Frame5.Visible = False
End Sub

Private Sub Command3_Click()
'change password frame 5
Combo2.Clear
Set rs = New ADODB.Recordset
rs.Open "select * from USERS order by user_name", cn, 1, 2

     
    If rs.RecordCount <> 0 Then
    
        If rs.EOF = True Then rs.MoveFirst
   
        Do Until rs.EOF
                         
            Combo2.AddItem Trim(rs!user_name)
            rs.MoveNext
        Loop
    End If
Frame3.Visible = True
Frame1.Visible = False
Frame2.Visible = False
'Frame4.Visible = False
Frame5.Visible = False
End Sub



Private Sub Command5_Click()
End
End Sub

Private Sub Command4_Click()
Unload Me
End Sub

Private Sub Command6_Click()
'New user ok button
  
 If Text1.Text = "" Then MsgBox "Enter User name", vbInformation, "New User": Exit Sub
 If Text2.Text = "" Then MsgBox "Enter Password", vbInformation, "New User": Exit Sub
 If Text3.Text = "" Then MsgBox "Enter Confirm Password", vbInformation, "New User": Exit Sub
  
 
   'chking if password and conforim are not same
  If Trim(Text2.Text) <> Trim(Text3.Text) Then
     MsgBox "Password and Confirm Password are not matched.", vbInformation, "Confirm Password"
     Text2.Text = ""
     Text3.Text = ""
     Exit Sub
  End If
  Set rs = New ADODB.Recordset
  rs.Open "select * from USERS where user_name ='" & UCase(Trim(Text1.Text)) & "'", cn, 1, 2
  
  'cheking user name already exit or not
  If rs.RecordCount <> 0 Then
     MsgBox "Already there is a user name with '" & UCase(Trim(Text1.Text)) & " ' .", vbExclamation, "New User"
     Text1.Text = ""
     Text2.Text = ""
     Text3.Text = ""
     Exit Sub
  End If
     rs.AddNew
     rs!user_name = UCase(Text1.Text)
     rs!user_pwd = UCase(Text2.Text)
     MsgBox " New User Added", vbInformation
     rs.Update
     Text1.Text = ""
     Text2.Text = ""
     Text3.Text = ""
     Text1.SetFocus

End Sub

Private Sub Command7_Click()
Frame5.Visible = True
Frame1.Visible = False
End Sub

Private Sub Command8_Click()
Dim ms As String
'DELETE
If Combo1.Text = "" Then MsgBox "Select User name", vbInformation, "Delete": Exit Sub
Set rs = New ADODB.Recordset
ms = MsgBox("Do you want really delete this User ? '" & Trim(UCase(Combo1.Text)) & "'.", vbQuestion + vbYesNo, "Delete")

If ms = vbYes Then
    Set rs = New ADODB.Recordset
    rs.Open "delete from  USERS where user_name= '" & Trim(Combo1.Text) & "'", cn, 1, 2
  MsgBox " User Deleted", vbInformation, "Deleted"
   Combo1.Clear
    'combo1
      Set rs = New ADODB.Recordset
      rs.Open "SELECT *  FROM USERS ORDER BY user_name", cn, 1, 2
    If rs.RecordCount <> 0 Then
    
        If rs.EOF = True Then rs.MoveFirst
   
        Do Until rs.EOF
                         
            Combo1.AddItem Trim(rs!user_name)
            rs.MoveNext
        Loop
    End If
End If

End Sub

Private Sub Command9_Click()
Frame2.Visible = False
Frame5.Visible = True
End Sub

    Private Sub Form_Load()
    Set cn = New ADODB.Connection
    cn.Open "dsn=USERS;userid=;pwd=;"
    
    End Sub
    Private Sub Command1_Click()
    Frame1.Visible = True
    Frame2.Visible = False
    Frame3.Visible = False
    'Frame4.Visible = False
    Frame5.Visible = False

End Sub



Private Sub Text1_KeyUp(KeyCode As Integer, Shift As Integer)
If KeyCode = 13 Then Text2.SetFocus
End Sub

Private Sub Text2_KeyUp(KeyCode As Integer, Shift As Integer)
If KeyCode = 13 Then Text3.SetFocus
End Sub
Private Sub Text3_KeyUp(KeyCode As Integer, Shift As Integer)
If KeyCode = 13 Then Command6.SetFocus
End Sub
Private Sub Text4_KeyUp(KeyCode As Integer, Shift As Integer)
If KeyCode = 13 Then Text5.SetFocus
End Sub

Private Sub Text5_KeyUp(KeyCode As Integer, Shift As Integer)

  If KeyCode = 13 Then Call Command4_Click
  
End Sub
'If KeyCode = 13 Then Command4.SetFocus
'End Sub

Private Sub Text6_KeyUp(KeyCode As Integer, Shift As Integer)
If KeyCode = 13 Then Text7.SetFocus
End Sub

Private Sub Text7_KeyUp(KeyCode As Integer, Shift As Integer)
If KeyCode = 13 Then Command10.SetFocus
End Sub
Private Sub Combo2_KeyUp(KeyCode As Integer, Shift As Integer)
    If KeyCode = 13 Then Text6.SetFocus
End Sub

Try something like this for your connection string.

Provider=Microsoft.Jet.OLEDB.4.0;Data Source=C:\mydatabase.mdb;User Id=admin;Password=;

That was from www.connectionstrings.com

Indeed...your error is coming from 1. lack of a filename in the connection string and 2. no driver specified. That should fix it as long as you can successfully modify it.