Assembly: Microsoft.Office.Interop.Word (in microsoft.office.interop.word.dll)
Use the Windows property of the Application or Document object to return the Windows collection. The Windows collection for the Application object contains all the windows in the application, whereas the Windows collection for the Document object contains only the windows that display the specified document.
Use Windows(index), where index is the window name or the index number, to return a single Window object.
The index number is the number to the left of the window name on the Window menu.
A colon (:) and a number appear in the window caption when more than one window is open for a document.
When you switch the view to print preview, a new window is created. This window is removed from the Windows collection when you close print preview.