Windows property as it applies to the Application object.
Returns a DocumentWindows collection that represents all open document windows. Read-only.
Windows property as it applies to the Presentation object.
Returns a DocumentWindows collection that represents all document windows associated with the specified presentation. This property doesn't return any slide show windows associated with the presentation. Read-only.
For information about returning a single member of a collection, see Returning an Object from a Collection.
Example
As it applies to the Application object.
This example closes all windows except the active window.
With Application.Windows
For i = .Count To 2 Step -1
.Item(i).Close
Next
End With