WorkbookOpen Event
Occurs when a workbook is opened.
Private Sub object_WorkbookOpen(ByVal Wb As Workbook)
object An object of type Application declared with events in a class module. For more information, see Using Events with the Application Object.
Wb The workbook.
Example
This example arranges all open windows when a workbook is opened.
Private Sub App_WorkbookOpen(ByVal Wb As Workbook)
Application.Windows.Arrange xlArrangeStyleTiled
End Sub