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How To Logoff My App

for Windows Application with vb 2005 , if the user doesn't do any thing with a while say 5 minuets , I want the system to automatically log off.  
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Ahmadal_najjar2003
Asked:
Ahmadal_najjar2003
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1 Solution
 
cool12399Commented:
* Have 1 global integer variable
* Have a timer that increments this global variable each second by 1
* if the value is higher than 5*60 (ie 300 = 5 minutes), then close application
* For any mouse/keyboard event that is triggered in the application, reset the global variable to 0
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Ahmadal_najjar2003Author Commented:
Ok , How to follow the mouse and keyboard events within the whole application
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Ahmadal_najjar2003Author Commented:
Ok , How to follow the mouse and keyboard events within the whole application
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Éric MoreauSenior .Net ConsultantCommented:
A long time ago (in an old VB6 application) I was having an invisible form with a timer which every half minute was checking for the active form, the active control on that form and the value of that control when possible. If none of those values were modified for 5 minutes (I was checking every 30 seconds) then I was leaving the application. Maybe you can do something like this.
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Ahmadal_najjar2003Author Commented:
It is really a nice Idea , but in some cases give this message
"Object reference not set to an instance of an object"

While My Code Like this

If MyMousePosition = Control.MousePosition And _
           MyActiveForm = ActiveForm.Name And MyActiveControl = ActiveForm.ActiveControl.Name Then

do you have any Idea, Why.
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Ahmadal_najjar2003Author Commented:
After I watch the Error , it belongs to ActiveForm.name , I feel this happen while I am closing the active form.

Any Suggest
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Éric MoreauSenior .Net ConsultantCommented:
You can trap it something like this:

    Private Sub Timer1_Tick(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Timer1.Tick
        Static sstrPreviousForm As String = String.Empty
        Static sstrPreviousControl As String = String.Empty
        Static sdtmLastAction As DateTime

        Dim strCurrentForm As String
        Dim strCurrentControl As String
        Try
            strCurrentForm = ActiveForm.Name
        Catch ex As Exception
            strCurrentForm = String.Empty
        End Try

        Try
            strCurrentControl = ActiveForm.ActiveControl.Name
        Catch ex As Exception
            strCurrentControl = String.Empty
        End Try

        If (strCurrentForm <> sstrPreviousForm) OrElse (strCurrentControl <> sstrPreviousControl) Then
            sstrPreviousForm = strCurrentForm
            sstrPreviousControl = strCurrentControl
            sdtmLastAction = Date.Now
            Label1.Text = sstrPreviousForm
            Label2.Text = sstrPreviousControl
        End If
        Label3.Text = DateDiff(DateInterval.Minute, sdtmLastAction, Date.Now).ToString ' Date.Now.ToLongTimeString

        If DateDiff(DateInterval.Minute, sdtmLastAction, Date.Now) > 5 Then Application.Exit()
    End Sub
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Ahmadal_najjar2003Author Commented:
Thats Very Nice .

Thank You Very Much. But I need from you one thing if you can. You Use static inside the timer
is this mean just for the first time when fired just assign string.empty value . then after that will keep the value which which assign later. If you can help me for the lifetime and visibilty of this .

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Éric MoreauSenior .Net ConsultantCommented:
Static variables have the lifetime of the class (form) in which it is found but they are only visible from within the method.
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Ahmadal_najjar2003Author Commented:
Thank You a lot
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