At times you will find it very handy to know what a user was doing in your application at a specific time.  
This information is always useful for debugging or security.  
  Use a table and this simple set of code to record all the users transactions that you want to track.  
Once you create the table and the module then you simply need to add two lines of code to each transaction like 
a form open or a form close event.
  Follow these simple steps and you will have a history of activity in your applications.  Step one and two only have to be done once.  Step 3 is needed for every event you want to track.

1  Create a table to hold the user log information and name it USysLog.  
Add these fields

Event       as    Text
EvTime   as   date/time

Save the form and click No when asked to create a Key field.

2  Create a module and name it and add the following code:

'Dimension a public variable at the top of the module.
Public LogEvent As String

'Next add this code in the module
Public LogEvent As String

Public Function LogEvt()
Dim SQL As String
SQL = "INSERT INTO UsysLog ( Event, EvTime ) SELECT '" & LogEvent & "' AS x1, #" & Now() & "# as x2;"
DoCmd.RunSQL SQL
End Function

  Close the module and save it.

3  Next add these two lines of  code to each event that you want to record a time for and edit the first line 
for the appropriate form name and event.  In this example, you would see the text Logon Opened and an 
associated time in the UsysLog table.  

LogEvent =  " Logon Opened "
LogEvt

  If you want to log a form opened time then put these lines in the form open event and likewise if you want to 
log the form close time put it in the form closed event and edit the wording on the first line accordingly.  
  Please take a look at  http://www.accesshelpebook.com/ and see if you can't take advantage of all of 
the examples found in our Access Help Ebook to help you make your databases more robust.
  Also, See our main web site for more details on our services and other Free Access Tips.
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You can find more help for Access at 
http://www.accessdatabasehelp.com 
http://www.biomationsystems.com/AccessTips.htm