Specifies whether the image should be flipped horizontally
Syntax:
Property Get Mirror() As Boolean
Property Let Mirror(ByVal Value As Boolean)
Remarks:
The Mirror property specifies a Boolean (True or False) value that indicates whether the film emulsion faces down.
Examples:
The following VBA example prints the document with the emulsion facing up and then prints the document again with the emulsion facing down.
Sub Test()
With ActiveDocument
  .PrintSettings.Prepress.Mirror = False
  .PrintOut
  .PrintSettings.Prepress.Mirror = True
  .PrintOut
End With 
End Sub