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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•	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 user.

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Procedure

To determine who is logged onto a database, follow these steps:

1.	CAUTION: 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.
2.	Open the sample database, Northwind.mdb.
3.	On the View menu, point to Database Objects, and then click Modules.
4.	Click New.
5.	Type or paste the following code: Sub ShowUserRosterMultipleUsers() 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, _ , "{947bb102-5d43-11d1-bdbf-00c04fb92675}") '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), _ rs.Fields(2), rs.Fields(3) rs.MoveNext Wend End Sub
6.	Save the module as ShowUsers.
7.	Close and then reopen the database.
8.	Press CTRL+G to open the Immediate Window.
9.	Type the following line in the Immediate window, and then press ENTER: ShowUserRosterMultipleUsers Note that the Immediate window returns a list of users who are logged onto the database.

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