how to do error handling in access vba

1 Sub|Function SomeName()
2     On Error GoTo Err_SomeName          ' Initialize error handling.
3     ' Code to do something here.
4 Exit_SomeName:                          ' Label to resume after error.
5     Exit Sub|Function                   ' Exit before error handler.
6 Err_SomeName:                           ' Label to jump to on error.
7     MsgBox Err.Number & Err.Description ' Place error handling here.
8     Resume Exit_SomeName                ' Pick up again and quit.
9 End Sub|Function

Dim Msg
On Error GoTo errorhandling   ' Defer error handling.
' code goes here, where potential problem occours
errorhandling:
' Check for error, then show message.
If Err.Number <> 0 Then
    Msg = "Error # " & Str(Err.Number) & " was generated by " _
            & Err.Source & Chr(13) & Err.Description
    MsgBox Msg, , "Error", Err.Helpfile, Err.HelpContext
    Err.Clear
End If