This article was previously published under Q128814
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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
Create a blank form that is not based on any table or query and name it DetectIdleTime.
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.
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
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.