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ACC: How to Detect User Idle Time or Inactivity

This article was previously published under Q128814
This article has been archived. It is offered "as is" and will no longer be updated.
Moderate: Requires basic macro, coding, and interoperability skills.
This article shows you how to create a procedure that will run if yourMicrosoft Access application does not detect any user input for a specifiedperiod of time.

This article assumes that you are familiar with Visual Basic forApplications and with creating Microsoft Access applications using theprogramming tools provided with Microsoft Access. For more informationabout Visual Basic for Applications, please refer to the "BuildingApplications" manual.

NOTE: Visual Basic for Applications (used in Microsoft Access 7.0 andMicrosoft Access 97) is called Access Basic in version 2.0.

NOTE: This article explains a technique demonstrated in the samplefiles, FrmSampl.exe (for Microsoft Access for Windows 95 version 7.0)and FrmSmp97.exe (for Microsoft Access 97). For information about howto obtain these sample files, please see the following articles in theMicrosoft Knowledge Base:
150895 ACC95: Microsoft Access Sample Forms Available in Download Center
175066 ACC97: Microsoft Access 97 Sample Forms Available in Download Center

How to Create the DetectIdleTime Form

  1. Create a blank form that is not based on any table or query and name it DetectIdleTime.
  2. Set the following form properties:
    OnTimer: [Event Procedure]
    TimerInterval: 1000
    NOTE: The TimerInterval setting indicates how often (in milliseconds) the application checks for user inactivity. A setting of 1000 equals 1 second.
  3. Enter the following code for the OnTimer property event procedure:

    NOTE: In the following sample code, an underscore (_) at the end of a line is used as a line-continuation character. Remove the underscore from the end of the line when re-creating this code in Access Basic.
          Sub Form_Timer()         ' IDLEMINUTES determines how much idle time to wait for before         ' running the IdleTimeDetected subroutine.         Const IDLEMINUTES = 5         Static PrevControlName As String         Static PrevFormName As String         Static ExpiredTime         Dim ActiveFormName As String         Dim ActiveControlName As String         Dim ExpiredMinutes         On Error Resume Next         ' Get the active form and control name.         ActiveFormName = Screen.ActiveForm.Name         If Err Then            ActiveFormName = "No Active Form"            Err = 0         End If         ActiveControlName = Screen.ActiveControl.Name            If Err Then            ActiveControlName = "No Active Control"            Err = 0         End If         ' Record the current active names and reset ExpiredTime if:         '    1. They have not been recorded yet (code is running         '       for the first time).         '    2. The previous names are different than the current ones         '       (the user has done something different during the timer         '        interval).         If (PrevControlName = "") Or (PrevFormName = "") _           Or (ActiveFormName <> PrevFormName) _           Or (ActiveControlName <> PrevControlName) Then            PrevControlName = ActiveControlName            PrevFormName = ActiveFormName            ExpiredTime = 0         Else            ' ...otherwise the user was idle during the time interval, so            ' increment the total expired time.            ExpiredTime = ExpiredTime + Me.TimerInterval         End If         ' Does the total expired time exceed the IDLEMINUTES?         ExpiredMinutes = (ExpiredTime / 1000) / 60         If ExpiredMinutes >= IDLEMINUTES Then            ' ...if so, then reset the expired time to zero...            ExpiredTime = 0            ' ...and call the IdleTimeDetected subroutine.            IdleTimeDetected ExpiredMinutes         End If      End Sub						
  4. Create the following procedure in the form module:
           Sub IdleTimeDetected (ExpiredMinutes)         Dim Msg As String         Msg = "No user activity detected in the last "         Msg = Msg & ExpiredMinutes & " minute(s)!"         MsgBox Msg, 48      End Sub						

How to Use the DetectIdleTime Form

To hide the DetectIdleTime form when the application opens, create thefollowing AutoExec macro:
   Macro Name   Action   ---------------------   AutoExec     OpenForm   AutoExec Actions   ----------------------------   OpenForm:      Form Name: DetectIdleTime      View: Form      Filter Name:      Where Condition:      Data Mode: Edit      Window Mode: Hidden				
You can add code to the IdleTimeDetected procedure so that the procedureruns if there is no user activity for the amount of time specified in theIDLEMINUTES constant value. For example, you could have Microsoft Accessquit with the following event procedure:

In Microsoft Access 7.0 and 97:
   Sub IdleTimeDetected (ExpiredMinutes)      Application.Quit acSaveYes   End Sub				
In Microsoft Access 2.0:
   Sub IdleTimeDetected (ExpiredMinutes)      Application.Quit A_SAVE   End Sub				
This procedure causes Microsoft Access to quit the application, saving allobjects without displaying a dialog box.
For more information about the Timer event, search the Help Index forTimer event.

Article ID: 128814 - Last Review: 12/04/2015 11:14:37 - Revision: 2.3

Microsoft Access 2.0 Standard Edition, Microsoft Access 95 Standard Edition, Microsoft Access 97 Standard Edition

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