This article shows you how to use Microsoft Visual Basic for Applications to output a list of users who are logged onto a database.
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When you use the following sample code, the following information is returned:
- Computer name.
- Logon name.
- Whether or not the user is currently connected to the database. (A user's ID remains in the lock database until the last user disconnects or until the slot is reclaimed for a new user connection.)
- Whether or not the user connection was terminated under normal circumstances.
This information can also be used to isolate problems with database corruption that is associated with the activities of a specific
: If you follow the steps in this example, you modify the sample database Northwind.mdb. You may want to back up the Northwind.mdb file and follow these steps on a copy of the database.
To determine who is logged onto a database, follow these steps:
- Open the sample database, Northwind.mdb.
Note In Access 2007, open the Northwind2007 sample database, close the Northwind2007 sample database, and then reopen the Northwind2007 sample database.
- On the View menu, point to Database Objects, and then click Modules.
Note In Access 2007, click Visual Basic in the Macro group on the Database Tools tab.
- Click New.
Note In Access 2007, click Module on the Insert menu in the Visual Basic Editor.
- Type or paste the following code:
Note The sample code in this article uses Microsoft ActiveX Data Objects. For this code to run properly, you must reference the Microsoft ActiveX Data Objects 2.1 or later version Library. To do so, click References on the Tools menu in the Visual Basic Editor, and make sure that the Microsoft ActiveX Data Objects 2.1 Library check box is selected.
Dim cn As New ADODB.Connection
Dim rs As New ADODB.Recordset
Dim i, j As Long
Set cn = CurrentProject.Connection
' The user roster is exposed as a provider-specific schema rowset
' in the Jet 4.0 OLE DB provider. You have to use a GUID to
' reference the schema, as provider-specific schemas are not
' listed in ADO's type library for schema rowsets
Set rs = cn.OpenSchema(adSchemaProviderSpecific, _
'Output the list of all users in the current database.
Debug.Print rs.Fields(0).Name, "", rs.Fields(1).Name, _
"", rs.Fields(2).Name, rs.Fields(3).Name
While Not rs.EOF
Debug.Print rs.Fields(0), rs.Fields(1), _
- Save the module as ShowUsers.
- Press CTRL+G to open the Immediate Window.
- Type the following line in the Immediate window, and then press ENTER:
Note that the Immediate window returns a list of users who are logged onto the database.
Article ID: 285822 - Last Review: July 3, 2007 - Revision: 7.1
- Microsoft Office Access 2007
- Microsoft Office Access 2003
- Microsoft Access 2002 Standard Edition
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