This example uses the WindowState property to minimize the topmost explorer window when it is not active. The sample code must be placed in a class module, and the Initialize_handler
routine must be called before the event procedure can be called by Microsoft Outlook.
Dim myOlApp As Outlook.Application
Public WithEvents myOlExp As Outlook.Explorer
Public Sub Initialize_handler()
Set myOlExp = myOlApp.ActiveExplorer
End Sub
Private Sub myOlExp_Deactivate()
myOlExp.WindowState = olMinimized
End Sub