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This example shows how to use a command line switch and a scheduled task to start a Microsoft Access application unattended and run some logic automatically.

Perhaps you need a switchboard form to appear for users when they open a database during the day, but you want the database to open automatically at night, skip the switchboard, and run some logic.  One option is to create separate front-end databases.  Another option is to give the database an autopilot that runs at night.  Here’s how.

(1) Add this code to your database:

Public gblnAuto As Boolean

Public Function IsAuto() As Boolean
' This function returns a True if database was started with the
' Auto command.

' IsAuto() Version 1.0.0
' Copyright © 2009 Extra Mile Data, www.extramiledata.com.
' For questions or issues, please contact [email protected].
' Use (at your own risk) and modify freely as long as proper credit is given.

On Error GoTo Err_IsAuto

    ' Check the command option to see if the database was started
    ' with the Auto command.  Set the global variable and pass back
    ' a True or False.
    If Command = "Auto" Then
        gblnAuto = True
        IsAuto = True
        gblnAuto = False
        IsAuto = False
    End If

    On Error Resume Next
    Exit Function

    MsgBox Err.Number & " " & Err.Description, vbCritical, "IsAuto"
    IsAuto = False
    Resume Exit_IsAuto

End Function

Though not necessary, you can use the global variable gblnAuto to control how the logic, the forms, or the reports are run.

(2) Create a scheduled task that uses something like this for the Run value:

“C:Program FilesMicrosoft OfficeOffice12MSACCESS.EXE” “C:TestCode.accdb” /cmd Auto

The value behind the /cmd command line switch will be returned when the VBA function Command() is called.

(3) In the database, create a macro named AutoExec.

The AutoExec macro will run when the database is opened.  Make the actions it runs conditional on the results of IsAuto().  For instance, if IsAuto() = False, the user opened the database, so open the switchboard form.  If IsAuto() = True, then the database was opened by the scheduled task.  In that case, run some logic and then close the database.


Download Code: basAuto.zip